Harry as a Noir style private investigator cleaning up the aftermath of too many hurriedly tidied threads after a war that was all too messy, in a world where the government barely functions, uncovering secrets and scraps of ancient power that Voldemort u…
Another random idea: Harry and Fleur are internationally famous art thieves in the vein of the Saint, Arsene Lupin, and Lupin the Third + Fujiko Min