4. Carles Puyol
The big, burly central defender is a true Barca legend. He redefined the central defender role by incorporating ball circulation in it. That tactic is now followed by top defenders like Jérôme Boateng and Gerard Piqué.
Puyol spent his entire career at Barcelona, captaining the side for most of it. He won 18 titles in 15 years at the club. Puyol was a very good person, and the ideal person to lead to side.