Cruyff gets my vote as the all time best. He was my intro to soccer (I knew of the Dutch national team as early as I did Cosmos because of a relative who loved soccer) and as entertaining as Garrincha and others mentioned above.
His impact on the game is incredibly deep and everlasting.
And his youtube clips, and games featuring the Total Football of Ajax and Netherlands is as fun as you'll find.
I highly recommend the book "Brilliant Orange" about Football in Holland. Obviously Cruyff is a central figure, though it uses footy to connect to Dutch culture as a whole.