At 5 in the countdown is a midfielder who was hugely influential in lifting Leeds from the Second Division to the brink of the English game's summit.
In 1962, Leeds United manager Don Revie turned to Everton midfielder Bobby Collins as he looked to build a side capable of taking the Whites back into the First Division, and the decision to sign the then 31-year-old turned out to be a stroke of genius.
Having also played for Celtic previously, the Scotland international clearly had an idea of what it took to play at the top and appeared determined to take Leeds there.
He was a leader on the pitch, and Revie decided to acknowledge that fact by making him captain. The appointment appeared to have an excellent impact as he led the side to promotion in 1964.
And their sensational rise almost reaped a league and cup double in their first season back in the top flight. However, they ultimately had to settle for second in both the First Division, as Manchester United won the title on goal average, and FA Cup with Liverpool needing extra-time to come out on top at Wembley.
Collins' role in Leeds' success was recognised as he was named Footballer of the Year in 1965, and he would continue as captain for another when a broken thighbone in a Fairs Cup clash with Torino would pretty much bring an end to his career at the highest level.
Although Collins' time at the club came to an end before the team enjoyed their most successful spell of the Revie era, it was arguably his leadership that inspired them to the level they would later reach. He helped instil the fighting spirit that made Leeds so difficult to get the better of, and his influence on the Whites remained for almost a decade after his departure.
Countdown so far: Number 30, Number 29, Number 28, Number 27, Number 26, Number 25, Number 24, Number 23, Number 22, Number 21, Number 20, Number 19, Number 18, Number 17, Number 16, Number 15, Number 14, Number 13, Number 12, Number 11, Number 10, Number 9, Number 8, Number 7, Number 6