Lance Armstrong from when he led the U.S. Postal team, particularly in the 2003-2004 Tours. Not just physically, but I like the way he seems to be.
A lot of what I find attractive in a guy has to do with his attitude--how he is, how he treats people, his interests and activities. A slobby guy who doesn't take care of himself, wastes his life, mistreats/disrespects people: huge, huge turnoffs.