Khan by far. His pedigree was the highest imo and his buzz was legit.
None of the He's the son of this guy, He's the next Mayweather, He's the next great Mexican to help carry him. Dude's hype was legit.
The Khan train never got rolling like it really should have.
To add: Khan has the lowest KO%, Khan has been stopped 4 time (Ortiz 5, but 2 are not "legit")
I was very impressed with Khan at the 2004 Olympics.
After the KO to Prescott, a lot wrote him off, then of course overly praised him after he made a nice comeback. He had a nice win in a fun fight over Maidana, but I think it was that fight where I really noticed the limitations beyond his chin.
It was a lot technical flaws, but some of it is just instincts. He would get overly excited over landing a right hand that he would often leap towards Maidana and then be too close to follow up with anything. He had fast feet but wouldn't move them in the right direction, and I thought he seemed just anxious with Maidana coming at him.
In general, he just seems like someone who has a tough time having that alertness, purpose in his movements, control, etc....And he had a lot of technical flaws to begin with. In some ways, he was extremely talented due to being blessed with blazing hand speed, height and range, fast feet, etc...But not necessarily that talented among pro boxers for having "feel for the sport". Someone like Salvador Sanchez, who had something like 4 amateur bouts, he had solid but not blazing hand speed, but seemed to just have more of a feel for boxing. Knowing what he was doing, picking up things quickly, cool under fire, etc....Most guys can train forever but not pick up things as quickly.
Ortiz didnt have the mentality. He had the hype machine and the storyline, but I never believed in him. Most of the time you have to see someone go through adversity first to see how they react before you can start having super high expectations. With that being said....there are a couple other guys that were major disappointments. Maybe even moreso than some of the guys listed here.
Hector Camacho Jr was a better fighter than he was able to show. He was an amateur champion and he had good speed and power. He was similar to Broner in a lot of ways. He wouldve beaten Leija had he not quit, but he did and that was the end of it for him. He mentally was never there which also contributed to him being out of shape all the time. Ortiz was at least in shape, at least JCCjr had the mentality inside the ring.
Camacho had the talent but not the mentality or discipline to stay in shape.
Another one was Dominick Guinn. Another decorated amateur with over 300 amateur fights. He admitted himself....he could beat those guys that were bigger than him because of his fear. When he faced guys he didnt have a fear of he got his ass tore up. No way a guy that talented shouldve gotten his ass beaten that many damn times. Think about this....almost half of his fights have been against top 10 heavyweight contenders and although he lost to damn near every one of them, he has never been stopped.
oh...and none of these fighters were as disappointing as Audley Harrison if anyone remembers him.
He's like a homeless man's version of his father. Hector Sr was immensely gifted, but after the Chapo fight, nose candy, alcohol, etc....he was just a major underachiever. I actually think he gives Floyd (and just about anyone else) at 130-135 a good fight, but he eventually he would go into survival mode after taking too many straight rights, and go into a shell and drop a decision.
Broner won like 4 world titles. tbh, really hard to call any of the 4 mentioned disappointments. especially considering the amount of money they made. they all have earned MILLIONS during their career. Ortiz probably has the least in purses but even against Mayweather he got a check for 2 milly. not sure how much more you can expect. he wasnt DLH.