Being a football manager is a difficult oul job.You're the first to be blamed for a team losing a game, and the last to be thanked for winning one too.But, despite the thanklessness of their task, some people excel in the role. They win games, trophies, and earn the respect of players, pundits and fans alike. Below is a list of 50 managers who have done exactly that throughout the history of the game - ranked, obviously. Derby County v Leeds United - Sky Bet Championship Play-off Semi Final: First Leg | Clive…