Something that’s been in the back of my mind since that post on the canonicity of LoTR went across my dash is Celeborn, the one character whose LoTR backstory I’ve never seen anyone treat as canon.
Now while it’s obviously incompatible with his Silm backstory, his family tree isn’t. It would be pretty simple to have Galadhon staying with his wife’s people instead of carrying on with his parents and later Galathil going west with Denethor. Having a relatively significant player in Second/Third Age politics who hadn’t come out of Beleriand would be interesting as well. …Now I want to write Galadriel and that Celeborn meeting.