i think Fletch is probably the go to for Chevy Chase
but from everything i've heard (even from my own wife who choreographed a scene he was part of) he is a world class ***hole
I hear Dan Akroyd is like that too. I heard him on Rogan a few months ago and I think he came across that way, really fake and a know-it-all.
But hey, Ghostbusters was good!