I have met several of these leaders. Problem is, that very few of them are also very successful.
Most of these "leaders" that I met, based a lot of their success from basically being able to stack their bs very high and bailing out before that stack fell over.
Interestingly, the one guy that I am the most sure of being a good guy and leader is also one of the most successful, having retired with several hundred millions in the bank.
But the most successful guy is the one with the worst methods, who is very close to become a billionaire (he might actually already be one, haven't checked on him for a few months).