‘Mavericks’ are by definition rare beasts in business management or any other organised activity.
The dictionary definition of itself explains the rarity. The word is taken from American ranching. Nothing is more conformist than a herd of cattle; the maverick, a stray, unbranded animal, is the exception that proves the rule. The word has become a metaphor for the human stray, the non-conformist who is ‘a determined individualist’ – and, perhaps, none too trustworthy.