We know that vampires suck. Beyond that definitions vary. A broad definition is:

For Investigator articles about vampires check the general index in Investigator No. 75.  If you're into books, useful ones include:

Vampire The Encyclopedia                1993, Matthew Bunson
In Search of Dracula                           1972, Raymond T McNally & Radu Florescu
The Natural History of the Vampire    1972, Anthony Masters

Some of the movies have more bite than others. Check which ones you've missed and perhaps do some catching up:

1913 The Vampire
1927 London After Midnight
1928 The Vampire
1931 Dracula
1931 Tabu
1932 Vampyr
1933 The Vampire Bat
1935 Condemned To Live
1935 Mark of the Vampire
1936 Dracula's Daughter
1936 Preview Murder Mystery
1939 The Return of Dr X
1940 Bat People
1941 Blood and Sport
1941 The Corpse Vanishes
1941 The Devil Bat
1942 The Undying Monster
1943 Dead Men walk
1943 Son of Dracula
1943 The Return of the Vampire
1944 House of Frankenstein
1945 Crime Doctor's Courage
1945 House of Dracula
1945 The Vampire's Ghost
1946 Face of Marble
1948 Abbot & Costello Meet Frankenstein
1950 Vampire
1952 Batula
1952 Old Mother Riley Meets The Vampire
1954 The Bowery Boys Meet the Monsters
1956 The Devil's Commandment
1957 Blood of Dracula
1957 Daughter of Dr. Jekyll
1957 Dracula
1957 Frankstein Meets Dracula
1957 Lust of the Vampire
1957 Not Of This earth
1957 The Curse of Dracula
1957 The Vampire
1958 Blood of the Vampire
1958 Horror of Dracula
1958 The Revenge of  Dracula
1958 The Return of Dracula
1958 The Vampire's Coffin
1959 Attack of the Giant Leeches
1959 Curse of Dracula
1959 Curse of the Undead
1959 I Was a Teenage Vampire
1959 Male Vampire
1959 Plan 9 from Outer Space
1959 Slave of the Vampire
1960 Black Sunday
1960 Revenge of the Vampire
1960 The Brides of Dracula
1960 The Leech Woman
1960 The Playgirls and the Vampire
1961 Atom Age Vampire
1961 Blood and Roses
1961 Blood Lust
1961 Dr Blood's Coffin
1961 Goliath and the Vampires
1961 Last Year at Marienbad
1961 Monster Rumble
1961 Oriental Vampires
1961 Slaughter of the Vampires
1961 The Bloody Vampire
1961 The Horror of Dr Orloff
1961 The Vampire and the Ballerina
1962 House on Bare Mountain
1962 The Horrible Secret of Dr Hitchcock
1962 Terror in the Crypt
1962 Uncle was a Vampire
1962 Vlad the Impaler
1962? White Vampire
1963 Kiss Me Quick
1963 Kiss of Evil
1963 Kiss of the Vampire
1963 Terror of the Crypt
1963 The Macabre Mask
1964 Batman vs. Dracula
1964 Black sabbath
1964 Dracula
1964 Dr Terror's House of Horrors
1964 The Castle of the Living Dead
1964 The Last Man on Earth
1965 Bloodless Vampire
1965 Blood Thirst
1965 Dance of the Vampires
1965 Devils of Darkness
1965 Dracula Prince of Darkness
1965 Hand of Night
1965 Planet of Vampires
1966 A Taste of Blood
1966 Beast of Morocco
1966 Billy the Kid Versus Dracula
1966 Blood Bath
1966 Blood Fiend
1966 Carry On Screaming
1966-1971 Dark Shadows (TV series)
1966 Dracula Prince of Darkness
1966 Hand of Death
1966 Orgy of the Dead
1966 Planet of Blood
1966 Queen of Blood
1966 Theatre of Death
1966 The Devil's Mistress
1966 The Hand of Night
1966 The Vampire People (=The Blood Drinkers)
1996 Wild World of  Batwoman
1967 A Taste of Blood
1967 Batman Versus Dracula
1967 Blood of Dracula's Castle
1967 Dance of the Vampires
1967 Dracula's Wedding Day
1967 Fearless Vampire Killers
1967 Mad Monster Party
1967 Return from the Past
1967 Theatre of Death
1967 The Blood Beast Terror
1967 The Blood Suckers
1967 Vampire
1967 Vampire Beast Craves Blood
1968 A Dream of Vampires
1968 Castle of Dracula
1968 Dark Shadows
1968 Dracula Has Risen From The Grave
1968 Dracula Meets the Outer  Space Chicks
1968 Fangs of the Living Dead
1968 Night of the Living Dead
1969 Blood Splattered Bride
1969 Creatures of the Prehistoric Planet
1969 Crypt of the Living Dead
1969 Dracula
1969 Dracula and the Boys
1969 Dracula, the Dirty Old Man
1969 Dracula Sucks
1969 Frankenstein's Bloody Terror
1969 Guess What Happen ed to Count Dracula?
1969 Incense for the Damned
1969 Men of Action Meet Women of Dracula
1969 One More Time
1969 The blood of Dracula's Castle
1969 The Magic Christian
1969 The Saint and Dracula's Treasure
1969 The Vampire's Curse
1969 Vampire
1969 Vampire's Love
1970 Blood Lust
1970 Blood of Frankenstein
1970 Bloodsuckers
1970 Count Dracula
1970 Countess Dracula
1970 Creatures of Evil
1970 Dracula's Baby
1970 Every Home Should Have One
1970 Fools
1970 Horror of the Blood Monsters
1970 House of Dark Shadows
1970 Incense for the Damned
1970 Love-making Vampire-style
1970 Lust for a Vampire
1970 Scars of Dracula
1970 Scream and Scream Again
1970 Sex and the Vampire
1970 Taste the Blood of Dracula
1970 The Body Beneath
1970 The Horrible Sexy Vampire
1970 The Sadist with Red Teeth
1979 Vampire
1970 Vampire Lovers
1970 Vampire Men of the Lost Planet
1971 Count Erotica, Vampire
1971 Count Yorga, Vampire
1971 Daughters of Darkness
1971 Dracula vs. Frankenstein
1971 I Drink Your Blood
1971 In Search of Dracula
1971 Lake of Dracula
1971 Night of Dark Shadows
1971 Return of Count Yorga
1971 Suckula
1971 The Blue Sextet
1971 The Deathmaster
1971 The House that Dripped Blood
1971 The Lust of Dracula
1971 The Night Stalker
1971 The Omega Man
1971 The Vampire Happening
1971 The Vampire Lovers
1971 The Velvet Vampire
1971 Vampire Happening
1971 Vampire Lust For  Blood
1972 Alabama's Ghost
1972 Blacula
1972 Bloody Fiancee
1972 Countess Dracula
1972 Curse of the Vampire
1972 Deathdream
1972 Disciple of Death
1972 Dracula
1972 Dracula A.D. 1972
1972 Go For a Take
1972 Grave of the Vampire
1972 Lips of Blood
1972 The Funeral
1972 The Night Strangler
1972 Tomb of the Blind Dead
1972 The Deathmaster
1972 The Grave of the Vampire
1972 The Secret Sex Life of Dracula
1972 Twins of Evil
1972 Vampire Circus
1972 Vampire's Bite
1972 Voodoo Heartbeat
1973 Andy Warhol's Dracula
1973 Attack of the Blind Dead
1973 Blood
1973 Blood Ceremony
1973 Case of the Full Moon Murders
1973 Casual Relations
1973 Count Downe–Son of Dracula
1973 Count Dracula & his Vampire Bride
1973 Crypt of the Living Dead
1973 Doctor in the Nude
1973 Dracula
1973 Dragula
1973 Hannah, Queen of the Vampires
1973 It Lives By Night
1973 Lady Dracula
1973 Legacy of Satan
1973 Scream Blacula Scream
1973 Nude for Satan
1973 The House of Dracula's Daughter
1973 The Innerview
1973 The Mystery in Dracula's Castle
1973 The Norliss Tapes
1973 The Satanic Rites of Dracula
1973 The Tenderness of  Wolves
1973 The Vampire
1973 The Vampires' Night Orgy
1973 Vault of Horrors
1973 Vlad the Impaler
1974 Allen and Rossi Meet Dracula
1974 Barry Mackenzie Holds His Own
1974 Bat People
1974 Black Day for BlueBeard
1974 Blood
1974 Blood for Dracula
1974 Bury Him Darkly
1974 Captain Kronos Vampire Hunter
1974 Chosen Survivors
1974 Dick and the Demons
1974 Dracula's Blood
1974 Dracula's Feast of  Blood
1974 It's Alive!
1974 Legend of the Seven Golden Vampires
1974 Old Dracula (=Vampira)
1974 Rockula
1974 Son of Dracula
1974 The Black Vampire
1974 The Dracula Business
1974 The Evil Touch
1974 The Hilarious House of  Frightenstein
1974 The Seven BrothersMeet Dracula
1974 The Vampire
1974 Vampira
1974 Vampyres
1975 Deafula
1975 Disciples of Dracula
1975 Living Dead at the Manchester Morgue
1975 The Thirsty Dead
1975 Vampyres: The Lost Girls
1975 Varney The Vampire
1976 Diversions
1976 Dracula
1976 Nightmare in Blood
1976 Spermula
1976 Suck me Vampire
1976 The Last Tycoon
1977 Dead of Night
1977 Rabid
1977 The Hardy Boys and Nancy Drew Meet Dracula
1978 Bram Stoker's Original Dracula
1978 Count Dracula: The True Story
1978 Dracula's Dog (=Zoltan, Hound of  Dracula)
1978 Nocturna
1978 It Lives Again
1978 It's Alive
1978 Nightwing
1978 Prince Dracula
1978 Till Death
1978 Vadim's Dracula
1978 Vampire Hookers
1979 Dawn of the Dead
1979 Dracula
1979 Dracula and Son
1979 Dracula Rocks
1979 Love at First Bite
1979 Nightwing
1979 Nosferatu the Vampyre
1979 Tales of Mystery and Imagination
1979 The Curse of Dracula
1979 Thirst
1979 Salem's Lot
1979 Vampire
1979 Vampire Hookers
1980 Dracula's Last Rites
1980 Mama Dracula
1980 The Monster Club
1981 Dead and Buried
1981 Dracula Exotica
1981 Full Moon High
1981 Shock Treatment
1982 Frightmare
1982 I Desire
1983 I Married a Vampire
1983 The Hunger
1984 Night Shadows
1984 The Black Room
1985 Billy the Kid and the Green Baize Vampire
1985 Count Duckula
1985 Dracula Sucks
1985 Fright Night
1885 Life Force
1985 Once Bitten
1985 Polish Vampire in Burbank
1985 Re-animator
1985 Return of the Living Dead
1985 The Tomb
1985 Transylvania 6-5000
1985 Vampires in Havana
1986 Blood Freak
1986 Graveyard Shift
1986 It's Alive 3
1986 Monster in the Closet
1986 Night of the Living Dead
1986 Vamp
1987 Creepshow
1987 Dead of Winter
1987 Graveyard Shift
1987 Monster Squad
1987 Near Dark
1987 The Lost Boys
1987 Outback Vampires
1987 Teenwolf Too
1987 Vampire Child
1987 Vampire Knights
1987 Vampires Live Again
1988 Alvina Mistress of the Dark
1988 Because the Dawn
1988 Beverley Hills Vamp
1988 Black Vampire
1988 Chillers
1988 Dance of the Damned
1988 Dinner with the Vampire
1988 Dracula's Widow
1988 Killer Klowns From Outer Space
1988 Lair of the White Worm
1988 Love Bites
1988 My best friend is a Vampire
1988 Not of This Earth
1988 Return of the living Dead Part 2
1988 The Nightmare Sisters
1988 Vampire at Midnight
1988 Vampires in Venice
1988 Vampires on Bikini Beach
1988 Vampires Strike Back
1988 Waxwork
1989 Dance of the Damned
1989 Fright Night 2
1989 Graveyard Shift 2
1989 Jitters
1989 Nick Knight
1989 Sleepover Massacre
1989 To Die For
1989 Young Dracula
1989 Vampire's Kiss
1990 Bloodlust–theVampire of  Nuremburg
1990 Carmilla
1990 Daughter of Darkness
1990 Evil Toons
1990 Graveyard Shift
1990 Howling 6
1990 I Bought a Vampire Motorcycle
1990 Night Angel
1990 Rockula
1990 State of Decay
1990 The Arrival
1990 The Reflecting Skin
1990 The Secret
1990 Vampire Cop
1990 Vampires from Outer Space
1990 Vampire Vs. Sorcerer
1990 Waiting Game
1990 Wanda Does Transylvania
1991 Bloodsucking Pharoahs in Pittsburgh
1991 Blood Ties
1991 Divine Enforcer
1991 Dawn
1991 Dracula: A Cinematic Scrapbook
1991 New York Vampire
1991 Son of Darkness
1991 Subspecies
1991 Sundown, the Vampire in Retreat
1991 The Undying
1991 Undying Love
1991 Vampire Trailer Park
1991 Waxwork 2
1992 Bloodlines: Dracula, the man, the myth, the movies
1992 Bloodlust
1992 Bram Stoker's Dracula
1992 Buffy the Vampire Slayer (TV series)
1992 Hellraiser III: Hell on Earth
1992 Highway to Hell
1992 Innocent Blood
1992 Tail of a Vampire
1992 Project Vampire
1992 Red Sleep
1992 Sherlock Holmes – The Last Vampyre
1992 Sleepwalkers
1992 The Reluctant Vampire
1992 The Vampyr
1992 Vampire in Paradise
1993 A Vampire's Life
1993 Blood in the Night
1993 Bloodstone: Subspecies 2
1993 Body Snatchers
1993 City of Vampires
1993 Darkness
1993 Deadly Love
1993 Dracula Rising
1993 Heartstopper
1993 Kingdom of the Vampire
1993 Knights
1993 Love Bites
1993 Midnight Kiss
1993 My Grandpa is a Vampire
1993 Night Owl
1993 Night Owl 2
1993 Project Vampire
1993 To Sleep With A Vampire
1993 Subspecies 2
1993 Vampire Brides
1993 Vampire's Embrace
1993 Vampire's Kiss
1994 Bloodlust: Subspecies 3
1994 Children of Dracula
1994 Children of the Night
1994 Demonsoul
1994 Embrace of the Vampire
1994 House Vampire
1994 Intercourse with a Vampire
1994 Intercourse with a Vampire 2
1994 Interview with The Vampire
1994 Nadja
1994 Night with a Vampire
1994 Subspecies 3
1994 Tale of a Vampire
1994 Vampire Hunter
1995 Addicted to Murder
1995 Bizarre's Dracula
1995 Bizarre's Dracula 2
1995 Blonde Heaven
1995 Blood & Donuts
1995 Darkness
1995 Dracula: Dead and Loving It
1995 Girl With the Hungry Eyes
1995 Immortal
1995 Nightbreed
1995 Night Hunter
1995 The Addiction
1995 Vampire Conspiracy
1995 Vampire in Brooklyn
1995 Vampire Vixens
1995 Vamps: Deadly Dreamgirls
1996 Buffy the Vampire Layer
1996 Caress of the Vampire
  ?   Caress of the Vampire 2
1996 From Dusk Till Dawn
1996 Kindred: The Embraced
1996 Le Vampire
1996 Night Shade
1996 Shadow Zone: The Undead Express
1996 Slaves of the Vampire Werewolf
1996 The Dreaded
1996 Vampire Centrefolds
1996 Vampire Journals
1996 Vampirella
1996 Vampires and Other Stereotypes
1996 Virgin Vampire
1997 Blade
1997 Club Vampire
1997 Ironbound Vampire
1997 Kiss My Blood
1997 Monkey Death Car
1997 Night Flier
1997 Night Shade
1997 Sleep When You're Dead
1997 The Creeps
1997 The Hunger
1997 The Vampyre War
1997 Vampire Holocaust
1997 Vampire Journals
1998 Addicted to Murder 2
1998 All Girl Vampire Catfights
1998 Blood Kiss
1998 Bloodstorm: Subspecies 4
1998 Dark Rose: Feeding and Breeding
1998 Dead Nude Sorority Girls
1998 Die Hard Dracula
1998 Embrace the Vampire
1998 Hangman's Daughter
1998 Kinky Vampire Sex
1998 John Carpenter's Vampire
1998 Nude Nasty Dripping Wet Vampires
1998 Nude Vampire Killers
1998 Razor Blade Smile
1998 Sorority Slumber Party Massacre
1998 Sorority Slumber Party Masscre 2 & 3
1998 Subspecies 4:  Bloodstorm
1998 Sucker: The Vampire
1998 Tainted
1998 The Dead Matter
1998 The Hunger Collection: Vampires
1998 The Vampirates
1998 The Wisdom of Crocodiles
1998 Ultraviolet
1998 Vampire Call Girls
1998 Vampire Dungeon of Horrors
1998 Vampire Lovers
1998 Vampire Milk
1998 Vampire Orgasms
1998 Vampire Sex and Death
1998 Vampire's Seduction
1998 Victoria's Shadow
1998 Witchcraft X: Mistress of the Craft
1999 Angel (TV series)
1999 Caress of the Vampire 3
1999 Carmilla
1999 Cold Hearts
1999 From Dusk Till Dawn 2
1999 Modern Vampires
1999 Mr Vampire
1999 Shadow Tracker: Vampire Hunter
1999 Titanic
1999 Vampire Blues
1999 Vampire Child
1999 Vampires of Sorority Row
2000 Addicted to Murder 3
2000 Barely Legal Lesbian Vampires
2000 Blade 2 Bloodhunt
2000 Crimson Heather
2000 Crimson Nights: Vampire's Seduction 2
2000 Dracula
2000 Laughing Dead
2000 Lust of the Vampire Hookers
2000 Mistress of Seduction
2000 Nightfall
2000 Shadow of the Vampire
2000 The Little vampire
2000 The Queen of the Damned
2000 The Vampire's Curse
2000 Vampire Night
2000 Vampires Anonymous