Cold Heart, Dark Soul

Harry, abandoned by the Dursleys, is raised in an orphanage and, through the actions of a surprise guardian, becomes almost a double of Tom Riddle; but Harry, who is cold, callous and holds amazing control over his magic, doesn't want to become Tom Riddle: he wants to become colder and darker than even Voldemort could be. Eventual Dark-Smart-Powerful Harmony: AU of all 7 years