#3 Romelu Lukaku
Zlatan Ibrahimovic aside, one thing Manchester United have lacked since Sir Alex Ferguson departed, is a consistent goalscorer.
As a result, United fans were understandably excited when their club signed Romelu Lukaku at the start of last season.
Lukaku had actually worked under Mourinho in the past, with the Portuguese manager selling him to Everton for £28 million in 2014. It was there that he really established himself as one of the best strikers in the league, scoring 87 goals in his 166 appearances at the club.
Mourinho would then sign him back for United, and the Belgian quickly went about establishing himself as the club's top striker, scoring 10 goals in his opening nine games. His form would inevitably dip throughout the season, but he still finished his first season at the club with 27 goals in all competition, and 16 in the Premier League.
Lukaku is still only 25 years old, and could turn out to be one of the best pieces of business Mourinho has ever done.