Vandal Savage
Vandal Adg was the leader of a small tribe of Cro-Magnons in prehistoric times when a meteorite crashed near him. The weird radiations from the meteor mutated Vandal, giving him increased intelligence and immortality. Vandal has lived through the following millennia, serving as a pharaoh in Egypt, an Emperor in Rome, and an advisor to Napoleon. Throughout history, Vandal has always quietly manipulated events from behind the scenes, always working towards his goal of ruling humanity.
Vandal took a more active role in his plans during World War II, when he fought with the Justice Society of America. His subsequent defeats have driven Vandal to become pro-active in killing super-humans before they can interfere with his plans.