I love the character of Superman, and although he may not be my favorite comic-book hero I still admire what he symbolizes and his rich pop culture history. So...
General Zod
General Zod was an inmate of the infamous Kryptonian prison, the Phantom Zone, when he first appeared in the pages of Adventure Comics #283 in April of 1961.
Forget Kim Jong-un -- we've got real problems now!