Damn, while I was thinking of all those I put in my prior post I thought of another one that I forgot about when I made said post, and it's a big one.
Morel Oral's two-part episode Nature when Clay goes on his psychotic drunken rant. Within that classic rant the moment that sticks out the most to me was 'THEN THEY GOTCHA BY THE right where it counts...." like it's on Adult Swim, so they could say balls or nuts or testicles or something, but I guess they figured it would be in character for any citizen of Moralton to censor themselves, even in a drunken psychotic rant.
I've always wondered if Clay's voice actor had to do a shitload of takes for that "scene" just out of bursting out loud laughing while trying to record his lines. That must've been something reading those lines in that tone when you're probably not even angry, maybe even enjoying yourself. And it was a long rant too, if memory serves.