I only caught a coupla minutes of it,I plan on catching it next time it's on for sure (kinda lucky here in DC metro area, we have four diff PBS stations so there's always multiple showings).
I have really great memorys of me and my mom watching that show togother when I was a kid. She had so many great talents and those surronuding her of course was what made the show all come togother, I mean who couldn't contagiously start cracking up when Harvey Korman would be losing it when Tim Conway was being hysterical.

There were so many great characters on the show as whole it'd be tough to pick a best

But if I had to pick the one that cracked me up the most would have to be Mr tudball and mis-sis-ha-wiggns.

JOHN