You say there’d be tons of movies to work with, but then go on to say that 3 of them are in the wrong timeframe. Also, ESB and RotJ are too far from the rest but the gap between RotS and ANH is no big deal? Even filling in that gap with spinoffs, you still have much big gaps. In your place, I would just use it all. If you wanted to, you could make TPM take place not long before AotC by simply making young Anakin a different character. Sure, it’s not a perfect solution, but it works. However, that doesn’t really matter when you’re still stuck with much larger time skips between trilogies that can’t be ironed out so easily. Maybe with a lot of work, you could pad out the gap between RotS and ANH using spinoffs (like placing RO opening where it would be chronoligcally mixed in with…some other stuff), but good luck trying to smoothly transition from RotJ to TFA.