Pinnacle of cartoondom? Nah. That one's a cinch... Wile E. Coyote and the Roadrunner.
They absolutely can NOT be beat.
There's one episode where Wile E. takes this hot air balloon with dynamite sticks with wings on them taped to the edges. The deal is that he'll drop them from the balloon while he's airborne, and they'll fly down and get the Roadrunner. Well...he lights all the fuses and one lets go. It catches an updraft, flies up and hits the balloon. *BANG!* He falls down. Cut scene one.
All throughout the rest of the show, every time he comes up with some new scheme, right before it's about to work, you'll hear "bzzzz!!!" as the little dynamite stick with wings flies in to blow him up!!! God, I remember my father and I laughing til we cried at that one!!! That and the famous episode with the catapault. Ohhh man that was the best!
As for new cartoons... The new Batman/Superman Adventures by Warner Bros. is about the best I've ever seen. Excellently done, no wonder it wins so many awards!