he didnt compete on the international scene i dont think, wing chun is not a sport and there was no internationals or belts like boxing.

Ali followed a sport tradition, lee started his own by merging all the best bit of martial arts and creating jeet koon do (sp?)

there are hundreds of martial arts masters that have the highest level of skill, because they do not chose to compete for a plastic trophy or plated belt and instead focus on their art, does it make them any less skilled?