Dr. Vale
Dr. Vale is a corrupt doctor who works for Lex Luthor in Superman: The Animated Series.

He works in Corben's prison to make John Corben a powerful friend of Lex. Vale secretly put a rare and deadly virus which has no cure into Corben's food and later gets him out of prison. After that incident, he earned tons of money from Luthor and never returned to prison. Later on, Lex sent a henchman to kill Dr. Vale off screen, a fact that he shared with Superman.