I get what you're saying here. But when you start talking about the pantheon of boxing greats: Robinson, Greb, Langford, Armstrong, Fitzsimmons, Charles, (IMO) Benny Leonard -- there is a big, gigantic, vast difference between them and everybody else.
Don't you scramble the top three around, though? Every time I feel like doing it, I watch Robinson footage and think, "Nah".
Well, I think the top 3 all of have a perfectly valid case for GOAT, but I pretty much stick to Robinson. I think everything we have suggests that he was the best ever.