At this point none of those fighters is interesting to me. Fury is too big and difficult for someone as average as those guys to have a real shot. If it had to happen then Whyte would be the best bet because of his power and because it would be a big event due to Whyte's unexplainable popularity.
Honestly I would like to see if Helenius can make some kind of epic, movie style viking comeback in the HW division and just have him swinging there against fury. Yes Fury would beat him even easier than he would Whyte but that fight just seems fun to me.
In reality, Usyk vs Fury is the fight we need to see, I'd like to see what Usyk tries to do in there to make things difficult and just imagine if he were to pull it off. It would be one of those win/win situations because nobody would blame usyk for losing against a guy that big/good and we know what would happen if usyk was the same size as fury.
Or Fury just knocks him out and makes him look like a lightweight and Fury becomes even more legendary.
As for Wilder, Joshua vs Wilder has to happen. In a perfect world Joshua would Fight wilder and the winner would fight the winner of usyk vs fury but no... Joshua gets an immediate rematch and that rematch will probably look worse than the first, Joshua probably gets knocked out now.