"Prince of Darkness" - also John Carpenter, the moster is a bit more atmospheric for a while, but what the hell. And it was the role Alice Cooper was born to play.
"Phantasm" and just for kicks, "Phantasm II" - it's a bad way to replace to a main actor, but the entire premise of Phantasm II in reaction to Phantasm is perfect, and perhaps a page not too far removed from the Repairman Jack books.
The first two Hellraiser movies - I very much see them as monster movies, but beyond those two I wouldn't pay attention to them.
Anything Harry Hausen I suppose... those Sinbad movies and the creatures of myth wandering about.