Grim Dawn (Harry Potter) by Robin4
Prior to Harry's third year, he leaves the Dursleys, desperate to escape. But before the Knight Bus can stumble upon him, he encounters someone far different, and his world begins to change.
(1) Becoming (Harry Potter) by Unexpected Inspiration
When Sirius Black escapes Azkaban and 8-year-old Harry Potter disappears, the world is thrown into upheaval. What will Britain and Harry be without each other, and who will face the Dark? You only THINK you've read this before. I guarantee you haven't.