One doesn't have to STRIVE for leadership to be a leader.  Aquinas was an inspiration to his students---much more than the bishop of Paris---who tried to excommunicate Aquinas.   Leadership is RECOGNIZED in others---whether in a 'Leadership position' or not.''

Secondly, these individuals were probably asked to be on this commission BECAUSE they probably demonstrated LEADERSHIP.

From what you write, I don't think you can recognize leadership qualities unless the person is wearing a Roman collar.  Too bad----these people are a dying breed.