#3 Andreas Pereira
Andreas Pereira has been trying to break into the Manchester United first team for some time now but has only been able to get playing time only of the bench. With the likes of Paul Pogba, Ander Herrera, Juan Mata, Jesse Lingard, and Fred it would be more difficult for the Brazilian to get regular playing time.
The 22-year-old needs regular game time in order to make a big name for himself and Arsenal would be a great destination for him.
Pereira is too out of contract in the summer of 2019 and would need to show his worth over the six months. If Arsenal could get a loan move for him it would be fruitful for both in the near future. The Brazilian is known for his technical and set-piece abilities.
The Red Devils would not sell a talent like Pereira but if Arsenal can crack a deal for the versatile midfielder, he can be a good replacement for the Welshman.