Professor Charles Xavier (Professor X)
Largely based on an inheritance from his nuclear scientist father, bolstered by his own shrewd investments and (we suspect) patents, Xavier is seriously wealthy. He's managed to rebuild his family mansion/school several times, each time extending and improving such amenities as its SR-71A Blackbird (price tag: $33 million!) landing pad and revolutionary Danger Room.
Worth: $3.5 billion
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