#4 Marcos Rojo
Another signing from Van Gaal. Marcos Rojo was signed by the Dutchman just after Argentina finished runners-up to Germany at the 2014 FIFA World Cup. You can't always win everything but a contract offer at a giant club like Manchester United must come close.
Rojo has had mixed criticism from United fans and the media during his three and a half year stay. He has been known for some nasty challenges against his opponents, showing weaknesses against the likes of Eden Hazard for Chelsea and Sergio Aguero for Manchester City. The Argentine has arguably not performed in the big matches for the Reds.
Some United fans believe that the defender has been given enough time to improve his defending, but has simply failed to.
There have been reports in the last month that Mourinho has had talks with Rojo over a possible new contract to remain as a United player, but should the Argentine decide to stay at the club, one can expect to feel a mixed set of feelings.