I don’t think there can be a single “best” player. It’s hard to identify all of the traits that would make one the best, let alone quantify them all. If luck is a factor, at least in short term success, how would one go about removing its effects in order to get down to the underlying skill? And, if one can’t remove luck, how could one determine who is the best?
Is someone who wins at higher stakes MTTs “better” than someone who can navigate the chaos of lower buyin games? It’s hard to say. If different skill sets are involved, which skill set is “better?”
The way leaderboards are set up, some can be won just by playing more than everyone else. Does this mean you are better?
I do think that it’s harder to be a well rounded player who can play various stakes and game types. To me, this is more of a challenge, but does it make me better? I don’t think it does.
I don’t think the question can be answered.