8. Rafael Benitez
Ask any Valencia or Liverpool supporter how good a coach Rafael Benitez is and they'll soon tell you.
The Spaniard, who is a tireless and meticulous coach, stunned La Liga by winning two titles with Valencia in the space of three seasons in 2002 and 2004.
He then moved to Liverpool, where he led the Premier League club to their first Champions League title since 1984.
His spell at Inter Milan was disappointing, but he returned to management in 2012, when Chelsea appointed him as their interim manager.
Benitez ended up winning the Europa League during his short spell at Stamford Bridge - and now finds himself in charge of Napoli.