The answer is obvious: NO. Manny, a great boxer, is not a better hero than Jose Rizal.
For one thing, Rizal is educated--he's a graduate of the Ateneo and a physician--he's an eye doctor. He also died for the Philippines.
Knocking back a few opponents in the boxing ring is great and everything but it isn't anywhere remotely close to writing Noli Me Tangere and exposing the evils of Spanish colonialism.