Harry Potter: A Rascalous life

Due to a deal the Potters made with a lesser evil before Harry's birth, he gets to live in relative anonymity, hidden by Fidelius Charms, a new identity, and a guardian far better than the Dursleys could ever be. But what events could this deal have set in motion, both for and against him? He'll need all the allies he can get... from all houses he can manage.