Gerald McClellan is the kind of fighter that Wilder SHOULD HAVE been

100% sure no Heavyweight is as coordinated as Gerald McClellan, first due to the difference in morphology. Second this hypothesized scaled-up heavyweight will have to be agile enough to deal with a Scaled up version of Julian Jackson trying to kill him with a single punch. So the natural reduction of skill/power in all heavyweights is simple evolutionary adaptation. So by effect of a smaller gene pool less coordination among that population, if we start cross breeding humans with a boxing intent then we can see abnormal results appearing here and there.

A 210 lbs version of Gerald McClellan will have to be 8 feet tall, for him to achieve the same leverage. That is the main problem with heavyweight boxers they are not tall/lanky enough, as of now Deontay Wilder is the ceiling of human evolution when it comes to boxing punching power. No human is supposed to punch as hard as Deontay Wilder, its modern downstream mutation (no Deontay Wilders genetic equals exist).

As of Wilder Coordination in Heavyweights, he is already the best among the Heavyweights, his coordination-athletic gift & fearless confidence is how he got the Olympic Bronze medal after one year of boxing, an impossible feat for most humans.

Most humans trained for that short time, are still unable to throw a proper punch & lack the form to beat the local gym Amateur boxer, let alone win an Olympic Bronze Medal.