#4 Diego Simeone

As the man that’s taken two super clubs like Barcelona and Real Madrid to the limit and beaten them, Diego Simeone is one of the most respected managers in world football. The man has single-handedly disrupted the pecking order in Spain in a way we never thought possible. He turned a good side in Atletico Madrid into a world class force, imagine what he could do with the resources at Arsenal.
Arsenal are one of the biggest clubs in the world, and they generate the highest average gate taking in the league and charge the highest season tickets in Europe. They have the money, the infrastructure, the worldwide appeal and the players. Diego Simeone is the exactly the type of revolutionary needed to shake the foundations of the club to the core.