carter hall

I'd say the Thanagarian Katar Hol because he can just change the name to Carter Hall, like how some alien immigrants change their foreign names to be more in line with a certain country's status. That way he's essentially both.

The same goes for Shayera, who becomes Shiera (and then has a descendant named Kendra who is freaked out by reincarnated Carter Highlander Hawkman who is actually still Thanagarian and all that jazz that makes the crazy continuity issues of the Hawkman series) xP