Benny is in rare air. Almost impossible to overate him. His ability was uncommon and his achievements matched.
I don't know if he was number one all time H2H. I do think he's top ten with Duran, Gans, Armstrong, Whitaker, Mosely, Mayweather, Ortiz, Williams and Canzonari ..
I have him at #2 at lightweight and #11 p4p. #1 is fine, and anything from 7-12 p4p all time is fine too. For me.
He is a lock for a top #3 at lightweight, and has a very strong case for #1. P4p he could be right up there, depending upon your criteria. He understood the finer nuances of Primo Carnera for goodness sake!