I've just been watching King Of The Hill on DVD and again been reminded of how brilliant it is in a low key way. Hank Hill is a towering comedy figure, and although from Texas, he's so repressed and buttoned down he could almost be English. I'm not sure that it's the best animated US sitcom of all time, but it's definitely in the top ten, and I'm surprised it hasn't been mentioned in this forum before.
And how come the Americans can produce so many great animated sitcoms (The Simpsons, Family Guy, American Dad, South Park) and we can't produce any? Sure, Monkey Dust was good for a series, but the second series dribbled away. And I Am Not An Animal was just okay. And the less said about Stressed Eric the better.