#3 Roy Keane
It was always going to be a match made in heaven, when the gruff temperamental Irishman met the gruff temperamental Scottish manager. With 11 career red cards, Roy Keane was the last man people expected Sir Alex to walk over to and hand the captain’s armband to, but that’s exactly what the manager did and Keane led the team brilliantly.
The Irishman was already an important figure in the team, but at the same time, he was no stranger to red cards and had critics questioning Ferguson's decision.
But the combative midfielder proved critics wrong and with him pulling strings from the middle of the park, Manchester United won nearly everything going into the turn of the 21st century. Keane, however, was never blessed with talent, unlike his teammates, but his consistency and unbending strength of character would always outdo his teammates time after time.
Keane soon became the core around which teams were built around and the former Ireland international wore the armband for eight years. During this period, Manchester United won four Premier League titles, including that incredible treble winning season in 1998/99 where the Old Trafford team won the Champions League for the first time in over 30 years.