I strongly recommend Fullmetal Alchemist Brotherhood! It's an amazing story of how humanity rises above it's flaws in an effort to defeat a group of those slightly less human. In this amazing story each character gets more amazing and epic as the story goes on. And the music is amazing as well.
Summary: In a world of medieval men and Youm live together. Youm are creatures capable of changing their appearance and become human, to hide between them and later eat them. To destroy these creatures were created half-human half youma Claymore, warriors are characterized by having only women and silver eyes.