34. Jack Klompus
Best-known episodes: "The Pen"
Morty Seinfeld's nemesis at the Del Boca Vista retirement community, Jack Klompus possesses a coveted "Astronaut pen" that he gives to Jerry, setting off a chain of events that would change the course of condo life forever. Klompus – played by Borscht Belt vet Sandy Baron, who passed away in 2001 – takes things too far at a roast to honor Morty's service as community president ("His administration did excel in one department: the hiring of incompetents!") and, in the two-part "Raincoats," smashes the window of Morty's garage to obtain a box of beltless coats. Finally, he accuses Morty of embezzling funds from the condo treasury in order to buy a brand-new Cadillac, usurps his power and purchases the car for $6,000. Of course, he ends up driving it into a marsh. Florida! JAMES MONTGOMERY