How will an American-raised, Joseph-McCarthy-worshipping Harry Potter react to wizarding Britain? The magical world isn't ready for the (very comedic) red scare coming their way.
Sirius take Harry in after his third year and teaches him the marauder ways. Hilarity ensues.
How does Harry Chadson Potter react to a magical world full of friendship, love, and war? "Ok."
Cedric's father raises him to be a covert dark lord. During the Triwizard Tournament he realizes he's not the only secret dark lord at Hogwarts.
Dumbledore is fed up. A group of aurors stunning Professor McGonagall is the last straw. Read many fanfics where an angsty Harry gets tired of having to wade through the Schnitzel that is his life and embraces the dark arts or just generally snaps? This is that fic for Dumbledore.
To everyone's surprise but his own, Ron becomes a powerful and successful wizard.