#2 Bastian Schweinsteiger

Louis van Gaal's time at Bayern Munich saw a lot of changes take place at the club, mostly for the good. The dutchman handed out first team debuts to Thomas Muller and David Alaba. He signed Arjen Robben and Mario Gomez, both of whom have proven to be successes.
Another important change he implemented was to change Bastian Schweinsteiger's position. When he arrived in 2009, Schweinsteiger was playing as a right-winger/right-sided wide midfielder.
Van Gaal most certainly did not approve of that, and thought very, very differently of Bastian. He saw him as a defensive midfielder, who could not only break attacks with strength and grit, but make them too with flair and finesse. The rest is history.
Now, Bastian Schweinsteiger has departed Bayern as a legend and plays his football in the MLS. He will always be regarded as one of the finest players we have witnessed. Good move, LvG.