In no particular order:
Dracula-the original followed by the Gary Oldman version
The Wolfman-the original, though I did enjoy the effects in the remake with Benecio Del Toro and Anthony Hopkins
The Lost Boys
The Howling
Alien-the first one
An American Werewolf in London (by the way the hot nurse was in "Captain America: The Winter Soldier")
Underworld-not scary but Kate Beckinsale-damn!!!

That's just off the top of my head for now.