To be on the short list of being the best ever, you have to be unbeatable.
During his prime, Sugar Ray Robinson was unbeatable.
Not only did he win, he was just so far ahead of everyone, it didn't seem like he could lose.
To me, that's the most important part. You have to win almost every fight by a wide margin.
Roy Jones did that for 10 years.
... for some reason, Floyd isn't getting credit for doing the same thing.
We're talking about a guy who rarely dropped rounds. And in almost every round he lost, he wasn't blown away.
He did that for 19 years! Which other athlete in any sport ever has done that?
This doesn't mean Floyd beats Duran. But I know for a fact, there are/were men who could beat Duran.
In this reality, I don't know who beats Floyd or even loses a real 7-5.
And no one can really say there was a man in Floyd's time who could beat him.
That has to count for something.
I disagree that you have to be unbeatable to be on the short list - I think you have to fight many other great fighters who are in their prime, and do very well against them. As phenomenal as SRR was, he wasn't unbeatable, although at welterweight he was pretty close and was never actually beaten by another welterweight, so he's probably the closest to unbeatable I can think of.
Roy Jones also shouldn't be in the discussion for TBE - I think he ranks well below Floyd actually. He was probably the top fighter of the 90s, but never fought good enough opposition to be much higher than #50 of all time.
Floyd-Duran is a very interesting matchup. If you take them from a random day in their welterweight careers, I'd favour Floyd due to his better consistency. If you take them at their welterweight best, I think Duran wins a competitive decision. However, Duran has the far more impressive resume of the two and for that, he's in my all-time p4p top 10.
At 130lb Floyd looked pretty close to unbeatable, but he never fought another great fighter at that weight. His win over Corrales was VERY impressive, although Corrales was a very good win, he certainly wasn't a great fighter. At 135lb he got a gift decision over Castillo. He lost 4 or 5 rounds against Zab Judah and got knocked down. He barely squeaked by a post-prime De La Hoya, although that was at 154lb, a division Floyd was never really big enough for. The first Maidana fight could have gone either way too and I think he's getting too much credit from some for the Pacquiao fight, seeing as both guys (but particularly Manny) were past their best and personally I don't think Floyd won all that decisively.
As I said before, no argument that he's an ATG. If he had decisively beaten Manny Pacquiao in 2010 when he was still in his prime, I would rate him higher, perhaps top 15. Add in wins over a prime Tszyu and Margarito and he's borderline top 10, but still well short of being in the Robinson, Greb, Armstrong, Langford discussion.