@spirtofradio and @bdp24 you guys missed numerous greats, but definitely have a great list going!
My instructor is Henrique De Almeida. He just left Berklee as a professor. Brazilian burn. Unreal. Gadd, Colaiuta, Erskine, Morello, Alan Dawson, Bozzio, Wackerman, Hakim, Stanton Moore, Copeland, Carey, Buddy... SO many others in rock, jazz, latin. The list could burn down audiogon. Of course, it goes without saying Peart. Those are some of my big list.
Probably one, if not THE most amazing drummers I have ever seen is Keith Carlock. Relatively unknown as a household named drummer, currently plays primarily with Steely Dan. Look him up. Wow...