arthur & morgana rule camelot together
looking for a specific fic, but all i remember is it was canon divergence, morgana didn’t go evil and she and arthur wind up ruling camelot together. the key thing was that they were king and queen but openly brother and sister, no incest- i think arthur married merlin and morgana married gwen. i don’t remember why morgana didn’t go evil- merlin might have told her about his magic, and then arthur found out about them both and was cool about it? but that’s just a guess- or what happens to uther.