Jeepers Creepers is a monster movie that came out back in 2001, well it was kinda a monster/slasher hybrid. I don't wanna talk to much about it, as part of the appeal is the mystery of the villain, but you should check it out, and then you could watch the sequel, it's not as good, but it's decent.
Drag Me to Hell was a film that came out back in 2009(?), the story is a young woman cursed to be, as the title suggests, dragged to hell. It was directed by Sam Rami (Director of the Evil Dead Trilogy, and the first Spider-Man trilogy, and Darkman).
And really dude? You've never heard of Silence of the Lambs? It's like one of the best horror movies ever
EDIT: Sorry about that little mistake everyone, dog was barking to go out