Too many to mention!
My favourite “one-liner” is when Hoagie says a statue of him would have a seam in it. Bernard has some good ones too, I can’t remember them off the top of my head.
But I think my funniest moments are not the one-liners, but the physical comedy, and the situational comedy. Like the cow in the intro that nearly comes along, or that one tentacle that thinks Laverne is ugly, but when she’s disguised as a tentacle she’s beautiful, or just everything about the beauty contest.
The humour is a bit of a sign of how things have changed though. There’s some jokes that come at the expense of mental illness (Dwayne and Ed Edison in particular) that you couldn’t do these days, but you can’t deny the writers had some great comedic skills!