1) Dawn of the Dead (2004)
It's rare that a horror remake is better than the original, but I think this one absolutely is. It found a good balance of humor, gore, and just being generally interesting.
I love the cast in this one. Plus, when I first saw this in theaters, it was one that served alcohol during the show, and that just enhanced the whole experience.
3) Shaun of the Dead
I have yet to meet someone that doesn't like this film. This is a parody done right.