Roy still had a way higher ring IQ than the average boxer and ESPECIALLY a damn basketball player with 0 amateur or professional fights. Roy had a good jab, phenomenal hook, good pull counter right hand, superhuman timing abd accuracy, a good counter puncher and body puncher, knew how to slip punches at the last split second by centimeters, etc. Those are all skills you can ONLY develop in the gym and tested with other professional boxers. He did not simply roll out of bed and beat world class fighters with sheer athleticism.
RJJ also trained boxing from when he was just 4 I think it was (might be 7). He also had a long amateur career and about 20 pro fights when he met anyone even close to Ali's level. Wilt was, what?, late 20's early 30's and would have had only one year of training and no fights, amateur or pro, when facing Ali.
So how come when his athletic abilities left him he couldn't rely on this IQ? He was getting slept for fun at one point.
Bob Sapp actually did very well in kick-boxing. But he was an absolute monster consisting to at least 50% of pure steroids.
You said "Imagine a HW Roy Jones" and I answered that Chamberlain was about a lifetime of practicing boxing from being that.
That's true, and it's a good point. He beat Ernesto Hoost twice which is crazy considering how good Hoost was. I mean, sure, Sapp glowed green at night, but almost every single time I have seen the "big monster comes to fight" routine they got splattered, steroids or no steroids. What is more interesting to me is how Sapp completely lost his confidence and went from scary MF to punchbag after CroCop bust his eye socket. I guess this is a case where combining size and sheer confidence went all the way. Good call.