Maybe Kell brook I know he was world champ and beat porter but his 3 title defences were absolutely dire and then made the stupid decision to fight ggg which ruined his whole career feel like could of done so much more
Michael Brodie - Should have gotten the decision over Jorrin to become world champion, again maybe could have gotten the nod over Chi in the first fight to be champion, given it was so competitive and he was fighting in his home town. But the wars caught up with him and he wasn't the same after the first Chi fight.
I think you could put Bruno in this category. Yes, he did beat McCall hook or by crook to actually win a title belt. But he had his nearly moment in the first Tyson bout but couldn't capitalise. And also looked pretty damn good against Lewis up until the 7th.
Kevin Mitchell almost made it, but Linares ripped that glory from him in the second half of their thriller of a fight. Mitchell had a good start to his career, but suffered bad setbacks against Katsidis and Burns, the latter being a title shot. But he rebuilt well and this lead to his second title shot, this time against Linares.
I don't think any version of Tim would beat Charlo. He is an exciting fighter to watch, but his ring IQ —especially his defense —is extremely poor at that elite level. Fundora and Bakhram hit him at will, and Charlo, in the early 2020s, was better than both. I think Charlo would've outboxed him over 12 quite comfortably, maybe even stopped him late. It might've been closer if they'd gotten him over to Australia, but I don't think Tim has shown anything to suggest he could compete against the elite at 154.
Michael Hunter looked like he was on his way to having a very good career then Matchroom let him go after he really should have got the decision over Povetkin and the guy who gave Usyk a decent fight and beat an in shape Bakole and looked like a top 10 borderline top 5 heavyweight at one point completely vanished.
Brook admits he struggled for years with addiction, depression, and lifestyle issues. He hasn't tried to use those as excuses but they should wouldn't have helped.
Oquendo came pretty close. Luis Ortiz was close. But for me it's Povetkin who I would have backed to beat Wilder. Tua right now would be making things interesting. He was never likely to get past Lewis though.