Who will shake off the rust and become the greatest titan in boxing history? Rusty fighters revert to type out of the gate. Boxing will play a lesser role. The big man will eat the little man.
Tyson won’t fight him. Also the greatest HW of all time is Lennox. And we know you love Fury, so I guess that makes your question rhetorical
P4p definitely better than both and I love usyk Inoue is already quite frightening, I don't want to imagine a 6'5 240lb version!!
But that's the thing though. As fantastic as Inoue is, he is fantastic at his current height, weight, reach etc. You can never know how good a fighter would be if he was taller/shorter/heavier/lighter. That's why I never cared for P4P lists, to be honest. It's quite a meaningless thing.
There is this old saying that "a good big one will always beat a good small one". But that's only half the story. The other half is this: and a great small one will always beat a good big one. That's the difference right there, mate. Fury is good, very good. But Usyk is an ATG and there is simply no aspect of boxing (maybe apart from punching power) in which Fury is superior to Usyk.