#4 Nabil Fekir
Nabil Fekir is a different option, to say the least, but that wouldn't make his arrival any less significant.
Of course, the World Cup winner is heavily linked with a move to Liverpool. But, come on, why would that stop United from pursuing a move for him? If anything, the excitement of battling with a rival should only make them more fired up to land his signature.
The Frenchman is mostly known for his creativity, but in my eyes, he is blossoming into a versatile player. This is why I feel like he could easily adapt to any role Mourinho would give him, and one thing's for sure: he will be fired up to capitalise on his World Cup win.
And let's not forget, Fekir has already came to Manchester this season and scored against United's rivals in the Champions League.