
G.O.A.T.
I don't know if you'd call that a Sitcom though. Regardless, it's the greatest television show of all time.
My favorite sitcoms:
Married With Children (How has this not been mentioned yet?)
Curb Your Enthusiasm (Sitcom?)
Seinfeld
The Wonder Years
It's Always Sunny In Philadelphia
Fresh Prince of Bell Air
All In The Family