6. Timothy Omundson
Known for: "Psych", "Judging Amy", "Jericho"
Seinfeld Appearance: "The Cheever Letters" Timothy Omundson plays the straight-laced Carlton Lassiter on fun USA series "Psych". Before that, he made small appearances on shows such as "Xena: Warrior Princess", "Frasier", and "Married...With Children". His first professional work as an actor came in 1992 as Ricky, the brother of George's girlfriend Susan Ross. We meet him when George and Jerry stop by the Ross' apartment a few days after their family cabin has burned down. Omundson's Ricky doesn't seem much interested in what's going on around him for most of the scene, staying in the background reading the newspaper. But when the insurance company drops off a metal box that survived the fire, the family opens it and discovers love letters written by the novelist John Cheever to Susan's father. At this, Omundson stands up in a hurry and questions his father about his homosexual love affair.