3- Laurent Blanc
The man who ended up filling Carlo Ancelotti's void at Paris Saint-Germain, Blanc was at Old Trafford as a player, and in my mind would have been an ideal choice.
The Frenchman was sensational whilst in charge of Bordeaux and perhaps would have enjoyed similar success in charge of the France national team had he not chosen to step down after a disappointing 2012 European Championship.
Blanc is a familiar face and young enough to forge a long career at Old Trafford.
Having experienced football at the highest of levels, and proven during his time at Bordeaux that he is capable of running a team when the pressure is on, one feels that he could have been a more suited version of what they were going for in David Moyes.