Okay, I'll buy Sudekis, in fact now that I look back, I'd put him at the top of the list. Just his dancing alone on the "What's up with that" skit qualifies.
Riggle, Rudd are not funny. Koechner is a decent actor and I guess pretty funny.. Riggle and Rudd are awful and no one will level set with them about that cold hard reality.
Larry the Cable Guy? Is proof that if you're around long enough you will eventually say something funny.