First off, I congratulate you on a very good post. In my opinion Oscar had the better legacy, though they both had good opposition, Oscar's was just a bit better. Furthermore, Oscar, took on all comers while, Mayweather dodged some good fights. For example; Cotto, Margarito, Mosely. De La Hoya, though he lost some of his fights, never avoided the tough opposition. In my opinion to be a great fighter, you have to take on the best, win or, and Mayweather retired before fully fullfilling his legacy.