#5 Jurgen Klopp
The man overseeing the recent transformation at Liverpool, Jurgen Klopp is responsible for getting The Reds into sync, moving them on from laughing stock of the Premier League into genuine title contenders.
He made a name for himself when he guided Mainz 05 to Bundesliga promotion for the first time in their history in 2004, before going on to achieve global renown for his work with Borussia Dortmund.
The 51-year-old inherited a Dortmund squad which had underperformed the season before, but under his stewardship, he forged them into one of the most entertaining sides in all of Europe, winning back-to-back Bundesliga titles, while also setting a number of records along the way including as the youngest side to win the Bundesliga title.
As a player, Klopp did not have much success, playing in the amateur ranks of Germany for many years, before signing for Mainz 05 whom he represented for 11 seasons in the lower divisions until his retirement in 2001.