Don Most: Don Most. Actor: Happy Days. Don is probably best known for his co-starring role as Ralph in the long running television series "Happy Days." During this time, he worked with such emerging talents as Ron Howard and Garry Marshall. Recently, Don was seen in a recurring role on the hit TV show - "Glee," as well as starring roles in the indie film - "The Yankles," and "Chez Upshaw," starring...
