After centuries of living, Harry goes through the veil, and end up in Death's office. He's sent to the One Piece world to be reborn. Fem!Harry Reborn!Harry Powerful!Harry Lots of fun (I hope) for everyone. Eventual pairing, I don't know who.

Grindelwald lives in Nurmengard. It is a gilded prison for him, but when he sees Dumbledore putting a foolish plan into action, he decides to intervene- taking Harry Potter from the Dursleys, to raise as his heir. See how Hadrian's journey through the magical world goes! No pairing until 3rd year at least. Raven!Harry, Smart/strong!Harry, Dark!Harry. I'll try to avoid bashing too.

Grindelwald wasn't as imprisoned as the world would like to think. In order to foil Dumbledore's latest plot, he escapes and takes the more powerful Potter boy from the steps of the Dursleys. NotBWL!Harry, Dark!Slytherin!Powerful!Harry. Manipulative!Dumbles. Not the best summary, just check it out.

Looking for a peaceful life after the war, Morgana (Fem!Harry) performs a ritual to take her to a place where she can live peacefully. Unfortunately, there's nowhere in her universe where that's possible, so the ritual throws her into the nearest alternate dimension. Now in Westeros, she's got to be a part of the Game of Thrones. Fem!Powerful!Ravenclaw!MoD!Harry.

There is an established Guild for Parseltongues of high power. There was a prophecy made at Delphi, in Ancient Greece detailing some of what will happen here in this story. Harry Potter is the brother of the boy-who-lived. There's a lot more to it than that, like that he's a parselmouth. After being abandoned, the Guild picks him up to train him for his destiny. Full inside.