Jon Gries
Appeared on: "The Beard" (Season 6, Episode 15)
Role on "Seinfeld": A homeless man
Since "Seinfeld": Gries played Uncle Rico in the cult comedy hit "Napoleon Dynamite" from 2004, and he's also starred in all three "Taken" movies.
James Spader? Really? Every heard of Pretty in Pink, or Less than Zero, etc etc...