I’d also like to nominate Colonel Saul Tigh from the re-imagined BSG
We meet him as a crusty, gruff, hard-drinkin, hard fightin’ old military man, hardened by the first Cylon war, and with a deeply ingrained hatred for the Toasters, and a marriage that’s, well, on the frakkin’ rocks, he can only find comfort and solace in a bottle…
he goes through many difficulties, a trial-by-fire as temporary Commander of the Galactica, and has his own share of frak-ups, but at least he’s keeping the Toasters at bay…
His wife returns, and for a time, so does happiness… only to have it unceremoniously yanked out from under him when he discovers his wife was a (unwilling) Toaster-Lover, he loses an eye as well…
Nevertheless, he slogs onward, never giving up the fight against Toasterpression, but at the cost of the only woman he truly loved, he succeeds, saving Humanity from another Toaster-induced genocide…
Only to be forgotten by the very people he sacrificed everything to save (I think the scene of Tigh, walking stoically away from the crowd on Galactica chanting “Adama! Adama!..”, holding back his emotions, was one of the saddest, and most understated scenes in BSG)
and after all of this, he finds out that He’s a Toaster himself, as was his wife……
Michael Hogan did a brilliant job portraying Saul Tigh, you’d think, after all that Tigh’s been through, it’d be understandable if, after all the hardships he’s experienced, that he’d have a terrible pain in all the diodes down his left side…