The problem with guys like Manny and Floyd is that history means a lot in boxing and a lot of people just aren't willing to admit their favorites have been surpassed. Being able to find ATG top 10s with guys like Jack Dempsey in them is proof of that.
The only problem with Manny is, he was never able to adjust in the ring unlike Floyd could, in his tough fights, where he actually was in serious trouble and had to think and use his Boxing IQ. But Manny was just Manny and jumped around darting in and out and side to side and never actually adjusting and changing his attack and style and actually using his Boxing IQ.
I don't know about everyone else and their list and their Boxing IQ test but i understand styles and studying techniques, so i believe i have good judgment of actual talent and skills, but everyone has their favorite fighters and old timers are not changing their list and that's that.
But the ring IQ and defensive techniques and offensive styles that Floyd was able to adjust and dissect and beat is very difficult and almost never done, and it's almost never done on the elite level where your facing superior talent after superior talent and just toying with multiple weight class champions and top pound for pound Boxers.
The top ten list, should be Boxers that actually had to use their Brains and not athletic freaks, that as soon as their athletic abilities were fading, they are destroyed and that's my problem with those fighters, prime example, Roy Jones and Mildrick Taylor.
Fighters that are actually thinkers in the ring, prime examples Ali and Floyd. Sugar Ray Robinson,
Seek and destroyers, but lower ring IQ Boxers, but still top 20, Chavez Sr, Marvin Hagler.
Ali didn't beat Gorge Foreman because of heart and strength, hell according to trainers and friends Ali was getting sick and not looking right, he beat Gorge using his Brain and his trainers were actually giving him a totally different strategy in the ring and actually asking him, what the hell are you doing ?
Sugar Ray Lenard had serious trouble with counter punchers and gifted Boxers, hell Duran was actually counter punching Lenard to death and actually was a superior inside fighter, but all Ray had to do was after 4 rounds when he just knew he was going to have to much trouble trying to out counter punch Duran, just adjust and out Box Duran, like he finally realized and adjusted in fight 2, so Lenards ring IQ wasn't very high, or he wouldn't of lost to Duran in their first fight and the problem that he didn't even try it, shows his wins were more of athletic abilities then Boxing IQ and that's why fighters like terrible Terry Norris and others beat him rather young in his age.
Mayweither didn't beat and outclass Canelo because of his athletic abilities, he actually was past prime in their fight, floyd was using his superior ring IQ against Canelo and thinking skills.
So that's just how i rank Boxers, it's about ring intelligence and the right adjustments, at the right times and overcoming serious adversity and that's something certain fighters just didn't do and failed to actually win certain fights easily, that they lost.