Manchester United’s transfer history has taken a bit of a hit after Sir Alex Ferguson and David Gill departed together in 2013. Before their departure, the tandem worked together to bring in some of the most iconic players and the structure on the pitch under Sir Alex Ferguson empowered them to play their best football. There were more hits than misses and it led to Manchester United becoming a powerhouse in English football. READ MORE: Manchester United transfer history 2013 to present dayEven among that list of legends, Gary Neville says there is one “massive” Manchester United transfer that…