Firstly, it must be acknowledged that something as trivial and subjective as an ego is very difficult to measure.
The actions of players and managers throughout their career have been accounted for, and we will not deny that appearance also plays a part.
Nothing screams egotistical more than a horrendous haircut.
This list, however, can only have 10.
Lionel Messi misses out because while he clearly does not lack self-confidence, the shy Argentine is incredibly humble and hardworking considering his talents.
There are plenty of youngsters such as Sociedad’s Antoine Griezmann who could do with the wake-up call that talent does not take you everywhere in football. However, there are those worse than the Frenchman.
Finally, while many consider Xavi's unerring obsession with “the way football should be played” quite irritating, he is merely one of many Catalans entranced by Cruyffian football philosophy. Barca's puppet-master is not egotistical, he has made a career based on the simple premise of making all those around him look better than himself.