Arcanum, a Codex favourite and a game possessing one of the best character creation systems found in an RPG... and we're picking Human fighter. Wow.
On a more serious note, how about
a Half-Ogre Officer: a highly distinguished and completely despised war hero. Proved himself a surprisingly cunning tactician on the battlefield despite his kind's commonly lowly intellect, enthusiastic scholar, always seen with a book and, as expected, a competent fighter.
His promotions and accolades stemmed purely from these traits, as each and every single peer and colleague hates his guts. But not for his lineage, or out of envy for his abilities, oh no. The hatred is due to his views on this world: all the puny, inferior races oppressed his kind and completely destroyed their culture, driving his kind into the brutish and degenerate state they are in now.
The irony of his half-blood is utterly lost on him, however, he does hold an unhealthy contempt of both his mother and father and their degenerate ways.
From this stems his contempt of any and all who deny the, to him obvious superiority, of all ogres. And while it did not diminish his battlefield performance, eventually his "comrades", or as he prefers to call them, "manboons", made enough "evidence" to discredit him completely.
His Commanding Officer, as a last recognition to his unquestionably heroic service, brought to his attention the upcoming expedition, and while he laughs at the very notion of this degenerate imbecile's success, sadly, even beings of his superior breeding are subject to the indignities of life.
And so, faced with a choice between starvation and the expedition, he cleaned his monocle, put on his top hat and accepted.
His name? Why, is it not obvious?