Married with Children and Seinfeld are both classics & personal favorites and equally share my vote based on the choices given, though overall I'd go with The Honeymooners as the best sitcom ever. Just a tremendously entertaining and groundbreaking show that gave many of today's sitcom writers the cliches that they constantly use over and over again. On top of just how perpetually funny that show is, it was performed without rehearsals or walkthroughs for its entire run. Jackie Gleason was one of the most talented performers in the history of Hollywood and Audrey Meadows and Art Carney provided one unforgettable performance after another.
Jason