Lily and James Potter gave birth to twins, Hera (fem!Harry) and Charlus. The humans had taken to the fact of vampires being among them, very well as a whole. No bashing, no kid politicians, no 11-year-old romances.
He isn’t mistreated, abused, or neglected. Here Harry is female and goes by name Selene Rosalie Potter-Black nee Evans. He is rude, unmotivated and doesn't give a crap who knows it. What is his role? Harry/Hermione/Harem Harry timetravel FanFiction. If Harry's baby brother, Daniel, is the Boy-Who-lived, then what of Harry? The story of an abandoned witch as told by the only mother she ever let into her heart.
More to help himself and his crumbling mother than Hogwarts. She was a Ranger, a message rider, a spy, and she was content with all of that. Merlin’s been keeping a close eye on the Riddle boy. Probably not exactly what you're looking for and it's more of an over-powered 'darkish' Harry after the first act but it fits your basic description.
