7: Iker Casillas - Real Madrid
An inspirational figure between the sticks and a model professional off of the pitch, Casillas tenure at Real Madrid speaks volumes of capabilities.
His claim for a regular first-team spot may have recently come under duress due to the emergence of Diego Lopez, but no one can deny the influence he's had at the Bernabeu over the years; the sort of influence that is not easily bought in the Spanish capital.
When Casillas hangs up his gloves it will be a sad day for all of football. He may not be playing week in, week out, but he still has the respect of some of the best names in the game.