Nah Atanamir is darker. 
Atanamir - Gerard Butler as in 300
I'm not sure about this, actually- I think Craig could play a very dark persona if given the chance. And Butler's role in
300 was certainly intense, but I wouldn't call it "dark". Indeed, the character Leonidas spent most of the movie in a sort-of state of "battle joy"; you really sensed that the character was happy, despite his circumstances, because he was exactly where he belonged.
When I think of Atanamir, I get a sense of a joyless, bottomless, almost Alexandrian ambition- not megalomania, but a strong belief that he can create a better world with his bare hands. Rather the opposite of Leonidas' simple warrior-king defending to the death his home and people.
