the ring belt followed by the wbc. after that its just a mish mash of ABC titles, its bad for boxing and it gives non-deserving fighters the privlage of being called a 'champion'! but its how the sport has developed unfotunatley, it should go back to how its used to be when the NBA split and became the WBA and the WBC, 2 champs put it all on the line in one mega fight and the winner becomes the top man, end of story!
its got to be mayweather. id put pac-man up there but in terms of concistensy you have got to hand it to lil floyd. he has beaten genuine world champs one after the other and has been making his way through the weights and picking up ABC's since the mid 00's were as manny has only really hit his peak in the last few years or so.