Many bankers are trillionaires, especially the FED's stock holder, which is a guarded secret. The ownership of banks can become extremely complex thus no one really understand who owns the bank, but bank owners are definitely among the trillionaire club

In fact, the ownership is not important, the most important is the ability to control. Even if you have no money at your personal account, but you can control a bank to drive large acquisition operation, you can achieve much more influence than Bill Gates. And I suppose that banks can freeze Bill Gates' account easily, so Bill Gates really have no control over any bank, he is the game player while the banks are game designer

Before, nobles and kings used to have control over banks, but Rothschild family invented the way to virtualize their wealth into stocks/bonds/asset certificates around the world, thus avoided control from the greedy monarchs