I'm sorry, but any heavyweight with 18 inch thighs is not a super athlete. I'm not big on measurements and bodybuilding in boxing. But come on. A slow, unskilled 6'7" guy with no defense is screwed against Tyson. Once Tyson is inside the height will mean nothing. Actually it will be liability. Wilders legs will turn into a pile of rubbery goo immediately.
Tyson would knock out Wilder; Wilder is far too basic to beat Iron Mike, sure Wilder is fast and has a good right hand but he doesn't have much more than that. Wilder isn't Holmes, Lewis, or Holyfield in the skill department and I think once Tyson gets inside it's over for Wilder.
Any version of Tyson up through the beginning of his trial would stop Wilder early (yes the version that lost to Buster Douglas included). Wilder's main assets are footspeed (sloppy but quick) and his right hand. his jab is not that good and he's been outjabbed by sub par boxers. Tyson's footspeed and footwork are on par with any HW any history, it actually makes more sense to measure Tyson's footspeed against a LHW or MW honestly. Tyson's power and combination punching are murder for anyone who can't wrap him up properly, and this isn't Wilder's strong suit either. And name one person that consistently drops their hands that ever beat Tyson at any point in his career. Even guys with monster chins weren't dumb enough to try that. Wilder's chin is "blah" to say the least. Tyson stops Wilder very quickly. Wilder doesn't have one tool to beat Mike.
Strongest in existence? Wilder doesn't even have one punch knockout power lol. Apart from abysmal glass jaw having Szpilka who did he knock out with one punch? And he fights no hopers.
Wilder has terrible defense Tyson would get right on the inside as soon as the bell rings and will be throwing non stop punches wilder will be out cold