#4 Marcelo Bielsa
Former Argentina, Chile and Athletic Bilbao manager Marcelo Bielsa is known the world over for his coaching prowess and is widely regarded as one of the best managers in the game today. A veteran manager with over 20 years of experience, the Argentinian has managed in Spain, Italy and in most recently in France with Lille.
Borussia Dortmund are a German club steeped in history and tradition with core values that fit the profile of Marcelo Bielsa perfectly. The Argentinian manager could bring stability and excitement to the club with attacking, fluent football despite a relatively small budget.
The highly experienced manager Bielsa guided Athletic Bilbao to the Europa League final a couple of years back playing a brand of football that was spectacular to watch. Dortmund would be getting the most experienced coach in world football, with great ability to mould and shape teams to achieve big things and have a bit of fun in the process.