Leaving a vacuum: Mr Dimon offered advice and assistance to US presidents, Treasury secretaries and regulators , and openly criticised past and present Fed chiefs Paul Volcker and Ben Bernanke .
The global financial community reeling from public outrage and increased regulation, is proving incapable of finding a champion to replace sidelined JPMorgan Chase & Co chief executive officer Jamie Dimon.
Mr Dimon, 56, one of the industry's most forceful advocates, has lost stature as his bank, the largest in the US by assets, juggles multiple investigations and a US$5.8 billion trading loss on wrong-way bets on credit derivatives.
His peers at other big financial institutions are hobbled by poor performance, tarnished reputations or a reluctance to step into the breach.
Bankers across the Atlantic, including former Barclays plc CEO Robert Diamond and Peter Sands of Standard Chartered plc, have been muted by allegations that their firms rigged interest rates or were involved in money laundering.