its very very close between Bill and Judy. Each are funny but not complete without the other. if i had to pick, it would be Judy, if for no other reason that the episode where they get their friends concert tickets and are explaining to Brian how they did it. When she goes thru the "flashback" and they show her making the laundry lump that is supposed to be the tickets, they show Judy all involved in fashioning the clumb, meanwhile in the back groun, all in slow motion, you see Tina grab a big knife, and Lauren running from her. They never talk about it, just show it in the back ground. I thought that was hilarious. I forgot to list that in the funniest part thread.