I understand your point but am still not willing to grant it. Even if it is clear that one player is "better than" another with respect to some particular criterion, it's still an entirely subjective matter as to what criteria you choose to equate with "best." I usually don't even read these best-player threads, much less contribute to them, because of the apples-and-oranges problem -- and because I don't even like to think of it as a competition in the first place. I'm sure you agree -- at least, mostly.
And FWIW, I prefer Wagner to Beethoven.