#10. Louis van Gaal
The Dutchman’s last managerial outing was with Manchester United. Before that, he has managed the Netherlands on two occasions, Barcelona and Ajax(with whom he won the Champions League). A tactical genius during the 90s, Van Gaal was a poor player. He began his playing career at Ajax bvut never played for the club and spent most part of his playing career in the lower confines of Dutch and Belgian football. Even there, Van Gaal did not impress anyone and rightly cut his playing career short to go for football management.