Some that jump to mind:

MURDERS IN THE RUE MORGUE
THE OLD DARK HOUSE
THE BLACK CAT
WEREWOLF OF LONDON
THE RAVEN
DRACULA'S DAUGHTER
SON OF FRANKENSTEIN
THE LADY AND THE MONSTER
HOUSE OF FRANKENSTEIN/DRACULA
THE BODY SNATCHER
THE CURSE OF FRANKENSTEIN
HORROR OF DRACULA
HOUSE OF USHER
THE CURSE OF THE WEREWOLF
THE PHANTOM OF THE OPERA
THE PLAGUE OF THE ZOMBIES (say what you like about Hammer, but the poster art was to die for!)
"Hideous Half-Man, Half-Beast Who Terrorized Millions!" - Tagline, WEREWOLF OF LONDON (1935)