Paladin. While i dont really believe in divinity or have faith in higher power, i could never be a straight up warrior. I like to think, use powers to the best of my ability, and protect/heal/command others to keep them fighting.
More specifically, a Paladin of Tyranny, a paladin of Lawful-Evil, willing to follow orders and lead a group without so much as flinching. While it is a "Evil" aligned class, it doesnt mean hes a dick. I just believe order, power, and leadership are what define backbone. And if the leadership is bad..... Well its time to replace it C: With force if need be.
In all truth, im not much of a leader, but i know how to take charge. Giving orders is easy, even if they happen to be bad orders, that could threaten the lives of everyone but yourself.
So, i have to say Paladin. Not a holy Paladin by any means, but a Paladin. Heavy armor, heavy sword, and heavy shield. So i can stand in front of my friends to protect them from danger!
..... And then pull them in front of me if things go down hill.