Evil Dead trilogy (Evil Dead, Evil Dead 2: Dead By Dawn, Army of Darkness)
John Carpenter's The Fog (original)
John Carpenter's The Thing
Hercules In The Haunted World
The Mystery Science Theater 3000 showing of Manos: Hands Of Fate
Night of the Living Dead (original)
Dawn of the Dead (original)
Return of the Living Dead
Poltregeist
The Entity
Various Godzilla films
Alien
Aliens
Conan the Barbarian (it's got demons and monsters, it's close enough)
Invasion of the Body Snatchers
28 Days Later
Hellboy
Pirates of the Caribbean: Curse of the Black Pearl (for the zombie pirates)