#1 Jose Mourinho (Inter Milan) - 2010
Mourinho was in Milan for a short period of two seasons but boy were those two good seasons. He won the league in his first season in charge but his second season was the hallmark of his time in Italy.
He strengthened his team considerably in the summer and the effect was clear. Inter won the Serie A, Champions League, and the Coppa Italia titles, firmly putting Mourinho on the Mount Rushmore of managers.
Inter defeated Barcelona 3-2 in the semi-finals, a result which Mourinho labeled as the best moment of his career.
Owing to his tremendous success, Real Madrid came calling and a world record compensation deal was agreed as Inter let the Portuguese go. What a way to bow out though. Absolutely sensational.