Best drummer in last 20 years -- CARTER BEAUFORD
Anybody who has seen him live, heard him play, or even better seen his instructional DVD comes away thinking this isn't fair, that a guy can be this good.
He's listed as #23 in this poll only because few rock/pop music fans and drummers over 50 have ever heard of him.
What makes him the most unique drummer I have seen in my 42 years is his open handed style on a traditional right handed kit, playing hi-hat and ride with his left hand to free up his right to do more amazing and complex things.
Just go to youtube and search Carter Beauford if you don't believe me. Plus have you ever seen a guy happier than him while playing -- he blows bubbles with his gum in the middle of insane drum solos and sings as well.
I wish I could play 25% as good as him...