I don't think there is an equivalent. That man transcended his sport. I don't know any boxer that did that to the extent he did. Maybe Ali, but that's debatable.
He's worth over a billion dollars. Not even Floyd is on his level money wise. Granted he has about 15 years on Floyd, but MJ got his wealth outside of playing basketball. Put his name on a product and it sells. Can we say the same for Mayweather? His fights sell, but I don't think he is branded like Jordan. I don't know if he'll catch up outside of fighting. Both rich however, so I can't hate. lol
As far as dominance? Jordan played everybody: Thomas, Drexler, Bird, Shaq, Kobe, Miller, Barkley, Malone, Ewing, Johnson. It is debated whether or not Floyd timed his fights when they were best for him. De La Hoya, and Mosley I believe were over the hill of their careers. The Pacquiao fight took forever.
I don't know, I think it's a tough one to put a boxer on Jordan level overall.