As Gellert Grindelwald gave his last breath in his cell in Nurmengard, as the seven month died, in the same instant, Lily Potter went into labor. A Gellert-is-reincarnated-as-Harry story!
At King's Cross Station, after Voldemort kills him, Harry makes a severely different choice. As the Master Of Death, his unique position allows him to ask for a specific boon. He chooses to go back to the 1900s back to when it all began and stop the war before it ever even has an opportunity to begin.
He'd moved on from the Battle of Hogwarts, really, he had. But of course, Fate hated him because suddenly he was waking up in the 1930s, penniless, wandless... and shit - Dumbledore was a redhead? And was it just him... or was McGonagall flirting with him?
In which Harry is finally killed by Voldermort, and then sent back into a different dimension. A do-it over fic. Gray!Prodigy!Harry, mistaken!Dumbledore, Good!Draco, more or less OK!Weasleys
In which, Harry is rescued from the muggles. It turns out the man who takes him away is the personal servant of queen Elizabeth II. Harry then finds out he is first in line to the throne as his parents aren't really his parents...(Harry Potter is similar to Sherlock Holmes) Dumbledore:slight bashing; Weasleys Hermione: Bashing