1. Isle of the Dead (1945)
2a. The Vampire Bat (1933)
2b. The Body Snatcher (1945)
3a. The Thing (1982)
Added a few more today.
3b. The Old Dark House (1932)
Another one I keep rewatching every year, so there's not much new to say. Definitely the best Universal horror movie that doesn't feature one of the classic monsters.
3c. Freaked (1993)
I figure this counts. A horror parody in the vein of Airplane!, Hot Shots and the like, starring Alex Winter (with an uncredited Keanu in an extended cameo). Pretty good makeup effects for such a silly movie, and a lot of the humor holds up better than you'd expect of something from that era.