[CappyAA]

Some of my favorite that haven't been mentioned:

Stan the Caddy - Classic in the Sue Ellen Michke trial when he told Kramer to have her try on the bra

Elaine's Rabbi - Not shutting his mouth with any gossip Elaine told him

The whole Bizzaro crew: [knock knock]
"Who is it?"
"It's Feldman"
[confused look]
"From next door"

The guy who made Jerry bootleg tape the movie (I forget his name)

The communist boyfriend Elaine had

The guy (Phil?) that lived next to Jerry who thought Jerry killed his parrot

The marathon runner



I'm sure there's much more