Messi
Lionel Andrés Messi
He's extraordinary. Truly extraordinary. At his peak he scored 91 goals in a calendar year, won five Ballons d'Or, and a boatload of club honours; in his relative (relative) decline, he's still one of the best in the world. Although, some might say he shouldn't be considered one of the best because he hasn't won a national title in the World Cup. It's a competition he's never won, and it's a competition in which he's never scored a goal in any knockout round games.
