[Exhibitman]

First of all, MMA and boxing are not analogs, so any comparison with MMA is just pointless. Put the best MMA fighter in a boxing ring under the unified commission rules and he will be out of his depth, as MacGregor was. It isn't the same sport. Michael Jordan was one of the greatest basketball players of alltime but was a sucky baseball player. Irrelevant.

Next, let's talk training, nutrition, etc. You cannot assume that a 1930s fighter would be living and training the same in 1990. The man is the same, the training techniques are not. How about we flip it and put Tyson in the gym in 1930 with crappy food, no A/C, rudimentary medicine, etc.

Knockouts are entertaining but are not the whole story. Not even close. 2018 HOFer Vitali Klitschko knocked out 87.3% of his opponents. Tyson knocked out 76% of his. Does that make Vitali better than Tyson?

Then there is how a fighter 'looks'. David, you've resorted to this eyeball test over and over again. How a guy looks is probably the least useful gauge of performance. Old time fighters didn't lift weights; the trainers believed it would make them too tight to box effectively. What they did was fight. A lot. Most of the guys on the top lists who fought in the earlier days had triple digits in total fights:

Henry Armstrong 181
Willie Pep 241
Sugar Ray Robinson 200
Harry Greb 298
Sam Langford 256
Benny Leonard 95 (in 11 years)
Bob Fitzsimmons 99 that we know of, lots of bouts not recorded in Australia on his way up

and so on. My point being, these guys were hard as a coffin nail and nastier than a rattlesnake. They had to be to survive, and the proof is in the way they responded to the roughest, toughest fighters. Louis lost once as a 22 year old; he came back in the rematch and broke Schmeling's back. Holyfield TKO'd Tyson and Tyson reacted in the rematch with a blatant series of fouls that got him disqualified rather than lose again.

Tyson was a killer as long as he was in with a lesser talent or a has-been, but his record against HOFers speaks for itself: 1-3. He is a legitimate HOFer and a legitimate top 20 heavyweight but he is not a top 10 P4P.