The Honeymooners was outstanding. I think the team of Gleason and Carney is the funniest in tv history.

I Love Lucy,The Andy Griffith Show, All in the Family, Mary Tyler Moore Show, Cheers, Seinfeld and Raymond are also favorites.

Many people rank the Chuckles the Clown episode on Mary Tyler Moore as the funniest sitcom episode of all time. It's certainly at the top. I also have to add the Honeymooners episode where Ralph and Norton make a live tv commercial.