I have to say that the Ron and Fez show has the best on-air staff of any show since Billy West was on Howard Stern. (That is not a knock against O&A, I just think Ron and Fez have made better use of their staff than O&A.)
I may be the only one, but I really enjoy East Side Dave on the show.
If we're going to place votes for others than the cohosts, then I go with a BxJohnny with P-Hicks as a close second. Johnny gets the nod b/c I've dealt with more often. Both great, stand-up guys with hearts of gold.