This is a very good question to ask, and I'll offer it for the Johnson backers to speak up. What is his best pure win when you factor in the age, activity level, weight, and experience of his opponents? It could be Tommy Burns, a 5'7" 168 pounds of him.
LOL, checkmate again Tony. You can't deal with the truth and facts. I offered you several questions to debate and two challenges.
Depends on ruleset imo, if Johnson's allowed to fight how he did in the 10s, he'd quite literally be one of Kenny's worse nightmares. The pressure Norton would bring would be quickly snuffed out by under hooks, neck ties and Johnson's spoiling style. Norton wouldn't grind Johnson down as Jack is both stronger and better conditioned. If it's Jack's era, it's over 20, I'd say Norton finishes on his feet, but he's a bloody exhausted mess. Under Norton's ruleset, he walks through Johnson. Johnson's defence wouldn't work as he'd be penalised for it and Kenny would have free reign to work his offence, Johnson was well conditioned but not very tough, Norton TKO8 ish
Ali was a tremendously strong fighter who tied up, held, controlled arms and neck... That wasn't enough to snuff Kenny's attack. As far as Jack being in better condition that Kenny, when exactly was this? A single fight against a retired boxer/active hay farmer? That bout proved nothing. Jack is more notorious being in less than optimal shape, or when actually arriving fit, being a 185-190 pound fighter.