In the Carrie 2013 thread I mentioned "The Loved Ones." I oversold it saying it a mix of Psycho, Carrie, and Texas Chainsaw. Those are all classics in their own rights. However, it's a good satire of horror films that will make you laugh and cringe. The soundtrack/score is excellent!
Wild Zero is a Japanese zombie film I have yet to watch but a friend recommended.
A list of some of my favs:
Silence of the Lambs
Let the Right One In
Evil Dead 2
Not horror but are classics w/ plenty of gore:
I really don't like horror so I haven't watched many, nor do I like the "so bad it's good" films.