Certainly up there with Ali and Holmes, if not surpassing those two in terms of recuperative abilities.
No one from that list. It's Mariusz Wach, who may very well be the most durable boxer of all time, may even be more durable than Oliver Mccall. Just take a look at this dude's chin: https://upload.wikimedia.org/wikipedia/commons/8/8a/Mariusz_Wach_2014.jpg Not much more needs to be said. This dude's chin looks like a bomb-shelter, where even someone like Wilder is more likely to break their hands if they land with full power on that chin, than they are to crack that chin. Never been dropped once, or even close, and that is after taking punches from some of the biggest punchers we've seen at heavyweight. And Wach seems just as durable to the body as to the head, unlike Joe Joyce for example.
The best chins don't get dropped anywhere near as often as Fury does. Someone like Wach, who has never been dropped before, is the definition of bomb-proof chin. In comparison to Wach, Fury is glass-jawed.
Hrgovic. Never down nor hurt as an amateur or pro. No one on list can say that and has has been tested as young lad vs. power punchers In Joyce, Yoka, and Nistor.
Who springs to mind for me. Current 'active' crop, I'd have to say Joyce and Usyk for not hitting the deck or being really buzzed. Recuperative powers I'd have to give it to Fury and Paint Dry. On a different note and spin, for getting KTFO at times and losing more fights than you can shake a stick at, but still mentally strong as long as the dough is right is Delboy. Crack the bloke's chin and he comes back twofold. He's mentally as fresh as a daisy in every fight, just as his chin is. AJ could do with some Delboy attributes.