So are you asking if I would accept a relegation now + 5 years in league one to get rid of Vincent Tan?

No, not for me.
Not judging you if it is for you, but I'd be happy to see Tan successful here - especially if he gets his way and we have an attacking team packed with youth etc.

Also the guy's in his 70s already anyway- presumably at some point he'll sell up.

That said, if the scenario you described did happen it wouldn't change much for me.