If we look at some of the prominent figures in Middle-earth at the time of the War of the Ring:
All of these are 'leaders' of one form or another, but some are more effective than others. Of course there are various aspects of leadership: charisma, inspiring others to follow you, decisiveness, impartiality, and so on. How many of these characters could be described as alpha males?
What has Tolkien said about the leadership skills of these characters?
Is there any sort of commentary in his notes or letters, or anything to suggest clearly how he rated them all as leaders?