Pelé, because he won three World Cups and shaped the game's destiny. True greatness is lasting impact, not a single moment.
Three cups may fade. Messi's quiet mastery, unselfish play, and perfect timing shape the game's soul, proving greatness is harmony, not tally marks.
Pelé turned World Cups into a blueprint for greatness: three titles, a lasting legend that reshaped the game. One more thing: he defined what lasting greatness looks like.