This is my list of favorite characters on the show...My list probably differs from most anyone elses because I do not include Tony in it. I really enjoy the humorous side of Soprano's so these are my top 5

1. Paulie (which isn't uncommon)
2. Uncle Junior
3. Bobby Baccala
4. Artie Bucco
5. Johnny Sack (the only one on my list you wouldn't consider humorous)

Many people might disagree with Artie but he has some great scenes even though he isn't in the series much anymore. The scene where he goes over to collect money from the french guy in Season 4 is absolutely great, I was dying laughing. Even the scene where he's practicing before he goes over was great.