Has to be Wilder. He's aging now, we will start to see a slow decline. He will eventually lose some of his speed that he relies on, and when he loses that he is in trouble. We now all know who is last of the big 3. Whether you think Fury or Joshua is top of the pile, we all can agree that Wilder is a clear 3rd at the very most (I still personally have Povetkin 3rd ahead of Wilder, I think he murders Wilder and gives Fury a nightmare)
Wont be Wilder, would have to fight someone with a pulse without the judges not knowing what they are looking at.
That's another interesting question which of the big three will fight Usyk first? I can honestly see them all avoiding Usyk.
Since AJ only fights handpicked no hopers, odds are it won’t be him. Still, his glass jaw means he could be stopped literally in any fight.