Hot take, Joe Frazier is unproven and I’ll explain why. He only ever beat 1 elite fighter and didn’t prove himself against any other guys or styles at that level, yes he beat Ellis, Quarry and Bugner, but they’re all movers/counter punchers, none of them are strong or could punch, Frazier never beat even a decent level puncher, specifically one who was accurate and could set you up and throw powerful combinations, he beat Bonavena, but he was crude and wasn’t precise, quick or accurate and wasn’t anything special at finishing and putting punches together. People just assume Frazier would beat Norton because Norton lost to Shavers etc, but Norton at least actually got in there with many more guys and many more styles and tested himself against punchers, for all we know, it could’ve gone similar for Frazier. Think about it, if Norton did the same as Frazier and didn’t fight any punchers except Foreman, he’d’ve had that avenged loss, also beaten Ali and lost to him twice (3rd fight controversial), lost to Foreman and beat Young, arguably better than Frazier’s resume, he’s only rated lower because of them losses against Shavers etc, but Frazier didn’t test himself against punchers like that, it could’ve gone the same way for him, people may laugh, but if Norton had done what I mentioned in his career, people would view him the same way as Frazier, since he wouldn’t’ve had losses against non-elite punchers like Shavers so people wouldn’t’ve known about the vulnerability. Norton fought many more guys at the top level, beat Ali, lost to Shavers, Foreman, beat Young and a prime Tex Cobb at 37 showing longevity, something Frazier never attempted, for all we know, it could’ve gone similar for Frazier or worse against the guys Norton tested himself against. For all we know, Frazier could’ve just not been able to deal with punchers, not saying I’d pick Lyle, but I really wouldn’t be as shocked as most if he cleaned Frazier’s clock, since how unproven Frazier is against punchers, from the eye test, you can see why he’d have problems, passive defence whilst pressuring, relying on bobbing and weaving and often taking one to give one, you can’t afford to do that against guys who are precise and can set you up for big punches. Frazier didn’t even test himself against the number of top level fighters in general that Norton did, obviously Norton’s gonna have losses dotted in there, as would Frazier if he he did same, he just didn’t attempt what Norton attempted.
Depends what you mean by "unproven". In the context of his era(which most consider the best HW one) he is, at least compared to his peers. Frazier almost beat Ali twice hes obviously proven in that sense. Frazier is 1-4 against Foreman and Ali and didn't fight Norton,Young, Lyle or Shavers. Fraziers wins are against lower top 10 HWs for the era and against your bigger opponents like Bugners and Mathis's he did struggle a bit. And the reason that matters is because most of the guys mentioned above fought each other. So Frazier stands out in a negative way there.
Going out on a limb here but it seems to me there are worse things than being an Olympic gold medalist, linear heavyweight champion with several title wins and having your only losses be to Muhammad Ali and George Foreman. Were there some styles that proved to be his weakness ? Sure but the same could be said of everyone
He does to most sluggers what he did to Ramos. Also despite starting later that Ali, he was much more of a late 60's fighter, falling out of his prime rapidly after FotC.
Frazier never lost a fight until he started partying and singing with his band and giving those things priority over his boxing career. As a smaller, pressure fighter he needed to train harder than his opponents. Whether it was his lifestyle or whether it was physical problems, after the first Ali fight, Frazier was not the dedicated, well conditioned fighter he had been prior to that fight. He fought Ron Stander and Terry Daniels after beating Ali. Prior to the first Ali fight he had fought the best available in the heavyweight division. He had beaten Ali, Quarry, Ellis, Bonavena, Chuvalo, and Mathis. His record after March of 1971 was 5-4-1. Frazier could be called "unproven" against fighters who came along after the first Ali fight, but from the time he turned pro until the first Ali fight he trained hard and beat whoever was put in front of him.
I know you're going to get alot of stick for this but i know what you're trying to say i don't think Frazier fought any of the real notable big bangers of that era like Ron Lyle, Mac Foster, Earnie Shavers, etc although i don't think he avoided any of them let me clarify that. Although in defense of Frazier he did beat Chuvalo who had alot of stoppages and had some power although Frazier pretty much dominated him. I think your choice of words maybe wrong because he did beat fighters who had power and he beat plenty of quality fighters like Jones, Bonavena, Quarry x2, Chuvalo, Machen, Ellis x2, Bugner, along with the greatest single win in Heavyweight history over Ali and that's a very respectable record. But i do know what you mean i'm not entirely confident of Frazier's H2H ability against bigger men who carry serious power. There's a thread here atm in regards to Ruddock vs Frazier and i wouldn't be totally confident in picking Frazier in that encounter to be quite honest.
The "word" is Frazier took it to Norton in sparring Here's a hot take- Ali could probably crack at least as hard as Louis when he wanted and especially against Frazier was likely some of his hardest punching