I doN't wanna sound like one of those scorn old heads who hate everything what's new (well I am young myself)
but I do think the likes of prime Tyson (whatever what you tell me about his resume), prime Klitschkos, Lewis, Holyfield, etc... would all kick the ass of both Wilder and Joshua
No offense to Joshua and Wilder cause they are entertaining champions and a fight between them gonna be fascinating, the winner of it probably be featured on every P4P lists and you can argue that these comparisons are unfair but at this point I really feel that
I don't think that any of them would be the exceptional athlete of their generation.
Crawford, Loma, Spence and some others who I see the exceptional athletes of this generation (they need to further prove it of course but when it's all said and done...) and not really Joshua or Wilder