Hey, tolkienhatesme - as a bit of a thank-you for that glorious R63 Maedhros/Fingon picture, there are a handful of fics that may be relevant to your interests as per the tags on that picture. They can get buried in the tags, not sure if you saw them.
Running on Fumes: Modern Runner!AU series by LiveOakWithMoss You are the Light that Blinds Me: Maedhros thinks of the one she loves, by Solanaceae An Exercise in Trust: Maedhris proposes an unusual way to help both her and Fingwen cope with thoughts of Angband, but not all ideas function as intended, by Innin (NSFW) Need: Maedhris and Fingwen play a game - of sorts, by Corollaire. (NSFW) Acquiescence: When Nelyafinwen Maitimë meets her cousin Findekániel Astaldë, they are drawn irrevocably toward each other, but will they overcome Maitimë's reservations and the strictures society imposes on them? by Elleth Assertion: Lady Maedhris asserts her right to rule over Himring and leaves her cousin Fingwen quite awed, by Elleth
Happy reading! :)