I've spoken about Tortoise on this board but the drummers deserve their own thread, check out John McEntire on the brushes:
http://www.youtube.com/watch?v=gP7Qu...earch=tortoise
Great track. The sound could be better but you get the idea.
John Herndon also drums and they do some quality 2 drummer action from time to time, here's a good (long) live video with a few tracks:
http://www.youtube.com/watch?v=5sps7...ortoise%20live