https://www.cbr.com/perfect-sitcom-characters-only-in-1-episode/

Sitcom characters have a way of becoming instantly iconic, and some are able to accomplish that in one episode.

https://www.cbr.com/perfect-sitcom-characters-only-in-1-episode/

Sitcom characters have a way of becoming instantly iconic, and some are able to accomplish that in one episode.

The Soup Nazi from Seinfeld is listed but I would have picked Alton Benes (Elaine's father) played by Lawrence Tierney, or Mr. Bookman the library cop played by Philip Baker Hall.