Laurent Blanc
Someone who knows the Premier League extremely well having played for Manchester United, Laurent Blanc moving to Old Trafford does make sense. The Frenchman knows the club really well and even played under Sir Alex Ferguson, so he would know what kind of football is required at the club.
He may not be a Jose Mourinho but he certainly is successful, having won multiple titles with PSG. He led them to another Ligue 1 title, this time setting a record and he might want to try his hand out in a tougher league. The Premier League is as tough as it gets but the Frenchman does have the quality to succeed.