Manchester United have had some outstanding defenders throughout the club’s illustrious history of dominance in English football. The centre of defence is perhaps the most important position on the pitch and Manchester United have had some brilliant leaders throughout their history. Whether it’s Steve Bruce, Nemanja Vidic, or Bill Foulkes, United have had some world-class defenders in their ranks. Here are our top 11 picks for the best central defenders that United have ever had. 11 – Paul McGrathBeginning our list is Republic of Ireland defender Paul McGrath. The Irish defender moved to Old T…