3: Roy Keane
The hot-headed, full-blooded captain who offered no quarter and installed fear into team-mates and enemies in equal measures.
Keane's capture for a British transfer fee record of £3.75m from Nottingham Forest may have been questioned at the time, but no one can argue that he wasn't worth ten times that much in the long run.
Becoming a crucial part of Sir Alex's side for more than a decade and playing with his heart on his sleeve every time he stepped out onto the pitch, Keane epitomised the fight and vigour Ferguson was known for.
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