To be clear, all these other options are subpar to the F-35. The comparison made between pilots who go from 4th Gen jets to the F-35 is that it's like going from a Motorola flip phone to an iPhone 10. The level of information, networking and automation is next level. And I don't think the Europeans will actually get there till their next gen programs (GCAP and FCAS).
So in the worst case, where we are cutting the F-35, then the best runner-up outcome to me is to cut a sweeping deal with the French, Rafales and FCAS partnership for the RCAF, shortfin Barracudas for the RCN, etc.