Depending on the psychological damage of the last fight, he probably beats most of the top ten. But he has had over 40 fights and managed to beat exactly one top ten fighter in that time, so whatever he may be capable of, he isn’t proving it to anyone in any event and he will probably retired after Fury 3 so it’s all hypothetical.
However I think he loses to AJ. AJ is a bigger puncher than Fury, who hadn’t stopped a decent opponent since Chisora. But one hit from Fury had Wilder out on his feet for the entire fight and back-pedalling.
Joshua is a much more skilled boxer than Wilder and has shown he has more than one gameplan. He would actually study his opponent to work out the best approach and I think he would tag Wilder before Wilder can tag him. After that I think Wilder would be wobbling all over the place like against Fury.
So I think AJ would have the skill to outbox and land a hit first, and probably hits harder than anyone Wilder has faced, and given what we saw after a hit from Fury in him I think it would be a matter of time from then to a stoppage.
Fury has taken away the fear factor that kept everyone at range. He got his flush in the first round and didn’t even react. He got up in the twelfth round when exhausted against a clean shot. Would anyone recover from that if it was the hardest punch of all time? Maybe Wilder doesn’t punch as hard as his myth suggests? So I think even someone like Whyte might have a chance to walk him down, though I’d still favour Wilder.