Babylon 5, with the white-knight Rangers, the captain who single-handedly saved humanity in the war with the Minbari AND THEN went on to build friendships with them, and the completely monotonic, both-sides-of-the-coin moralities of the Shadows and the Vorlons?

Yes, the Narn and the Centauri were not so pure, but it reads as a pretty mythic Good V Evil world to me.