you have to take into perspective, johan cruyff won multiple ballon dors, revolutionized the game of football, both as a player and as a coach. van persie was just a good striker, nothing more.
and yes, best is not equal to greatest. aaron rodgers is a better quarterback than tom brady, still brady is undisputed goat of american football. there is so much more to it than just raw skill, there is the individual success, team success, the influence you have on other people, the persona outside of the game etc.