I don't have a crystal ball but I have a strong guess about which of these options are most likely to be implemented.
Not only will tax payers likely pay for this but the most likely tax payers to pay are the ones with the least flexibility (stuck with variable rate debt, limited banking choices, no dedicated money managers working on their behalf) aka the poorest tax payers.
If my assessment is correct, they have somehow found and settled on a solution more disgusting than a generally distributed tax payer bailout.
4) Banks get their privileges revoked and they are no longer an oligopoly with privileges of being the only way to store dollars legally, and the only investment institutions who get to gamble their customers money while the government is insuring their loses but does nothing about their gains.
The Fed releases a digital dollar that you can bank without needing to be a part of this oligopoly. Banks are forced to give better terms to be attractive again, terms that will make up for the risk of the bank using your money. Deposits are no longer guaranteed because being in a bank is now a deliberate choice instead of something you're forced to do despite having money.
Banking is not competitive in any way. The small players are very risky to bank at. The big players get to be riskier because they are protected by the government.
That's not a given since it may just reduce profits. Banking is a very competitive environment.