I don’t think Mike Tyson dominated his era either. He made two defenses of the lineal/unified championship and got KTFO by Buster.
I'm less concerned with when he became lineal than if he beat the best, but Holy was the best contender during Tyson's reign and Tyson never beat him, so there is something to that.
Yeah, and even working around his prison sentence (before or after) he managed to not face Lennox Lewis until he had to (for $$) while well past his prime and skipped Bowe. People can say he would have beaten Holy if they’d fought earlier, but him losing to Buster (and then getting injured in training iirc) spoiled that. So that’s on him too.
Bowe didn't face top level opponents aside from Holyfield so it seems unlikely he would have ever agreed to fight Tyson. If Tyson didn't hold all the belts there would be no way to force a fight with Bowe.
No attempt on Tyson’s part to make the fight so I don’t think you can push it all off on Bowe. If Mike had fought Lewis earlier you can make the case, but King wanted to keep Mike away from people who could beat him as best he could post-prison. I’d say Mike’s post-prison slate of opponents isn’t a lot better than Riddick’s, really. And Bowe beat Holy twice, so there’s that. The biggest thing to me is how Tyson’s ride-or-die fans want to pretend the Buster Douglas fight never happened. You absolutely cannot claim to have dominated an era and cleaned out a division (as they often do) and ignore that fight. He lost to at best a mid-level contender and lost in dominant KO fashion.