Age: 55
Occupation: Chairman and CEO of JPMorgan Chase & Co.
Previous TIME 100 appearances: 3
Known unofficially as America's least-hated banker, Jamie Dimon is the financier who has best navigated the financial crisis, keeping JPMorgan solvent and continuing to lend throughout the credit crunch of the past three years. He's now using his goodwill capital to lead the crusade against further regulation in Washington, going head to head with tough cops like Elizabeth Warren, the acting head of the Consumer Financial Protection Bureau. Dimon doesn't worry that his bank, which has grown through the crisis, is too big to fail — indeed, he'd like banks to get bigger.