#4 Diego Simeone
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Diego Simeone's work at Athletico Madrid speaks for itself. The former Argentinian international has managed to make Athletico Madrid into one of the biggest clubs in Spanish football and has won seven trophies during his time at the club, including one La Liga trophy, and two Europa Leagues.
While Simeone is not the most popular former footballer in England, his attacking style of play would no doubt be welcomed by the Old Trafford faithful, and there is every chance that he would finally be able to finally return some glory to the former Premier League champions.
Edited by Ben Winfield