Sir Alex Fergusen

If this list gets compiled 50 years from today, this man in all likelihood will still be on the Number one position.
The man who managed to win 13 premier league, five FA Cups and two champions league titles in 26 years with Manchester United, is unarguably the best Football manager the game has ever seen. He also unsurprisingly, is the manager with most premier league wins(410) and most premier league points(1752) in the history of the league. Ferguson won 11 manager of the season awards, 27 manager of the month awards and managed record 190 games in UEFA Champions League
Apart from winning numerous trophies, Fergusen excelled throughout his career in establishing and improving young players and getting best out of them for a sustained period of time. Even though he often spent big in the transfer market, his reliance and faith in homegrown talent and academy graduates helped Fergusen deliver consistent success for good part of 25 years.