10% of me can't help but muse Marvel may have taken note.
Their inversion event converted nearly every villain into a hero for a brief time, iirc, but I don't have the books that comprise that arc, so I can't right now be sure.
One unexpected and remarkable heel "turn" that occurred since then, however, which may prove very hard to top, involves one Crusher Creel, bka the "Absorbing Man" ...
Black Bolt #6 (2017)
Edit: Did not read thread, but stand by him being a heroic villain in general.
Doom, of course.
He's not Darkseid, doing away with free will. Nor is he benefiting himself at everyone's expense. He's just an egoist who believes he can run things better then anybody else.
And in every alternate reality where he takes over the world, the world is better off for it.
