So Rick Ross isn't a legend because he's not "real"? That's crazy. The music and his career as a rapper should be the only thing analyzed in regard to him being a legend. The question should be whether or not he's made legendary music and whether his career as an artist is legendary.
At this point, has Rick Ross created music and had a career that will be canonized in Hip Hop history as legendary? Everything else is irrelevant.
Personally, I don't think he has at this point. Time will tell.