u pretty much listed all the better less typical ones. ill just mark this with this reply. be back here in a bit lemme dig thru my lists.
The villainess turns the hourglass
I Don't Love You Anymore
maybe?
im not really sure if some of these are what you are looking for exactly but they do make you think and are not at all the classic fluffy ones, there's some tragedy and revenge and stuff though if its romance its inevitable theres gonna be some fluff at some point so sorry
- https://www.mangago.zone/read-manga/the_villain_s_savior/
- https://www.mangago.zone/read-manga/i_tamed_a_tyrant_and_ran_away/
- https://www.mangago.zone/read-manga/the_villainess_reverses_the_hourglass/
- https://www.mangago.zone/read-manga/the_villainess_lives_twice/
- https://www.mangago.zone/read-manga/aidin/
- https://www.mangago.zone/read-manga/the_villainess_is_a_marionette/
- https://www.mangago.zone/read-manga/your_majesty_please_don_t_kill_me_again/
- https://www.mangago.zone/read-manga/angelic_lady/
- https://www.mangago.zone/read-manga/villainess_maker_1/
- https://www.mangago.zone/read-manga/untouchable_lady/
- https://www.mangago.zone/read-manga/a_stepmother_s_m_rchen/
- https://www.mangago.zone/read-manga/secret_lady/
- https://www.mangago.zone/read-manga/glass_wall/
- https://www.mangago.zone/read-manga/reminiscence_adonis/
- https://www.mangago.zone/read-manga/surviving_as_a_maid/
- https://www.mangago.zone/read-manga/the_great_wish/
- https://www.mangago.zone/read-manga/as_long_as_you_like_it/
- https://www.mangago.zone/read-manga/ebony/
- https://www.mangago.zone/read-manga/the_flower_dance_and_the_wind_song/
- https://www.mangago.zone/read-manga/duchess_of_the_glass_house/
- https://www.mangago.zone/read-manga/the_emperor_reverses_time/
- https://www.mangago.zone/read-manga/the_devil/
- https://www.mangago.zone/read-manga/the_thorn_that_pierces_me/
(again sorry if these arent what youre looking for but i think they fit somewhat well with what youre looking for)
You and I have similar tastes!! Though I also do really like fluffy isekai stories sometimes heh! You might like these:
https://www.mangago.zone/read-manga/a_stepmother_s_m_rchen/ <- this may seem fluffy at first, but as you read you see the flashbacks in previous(?) timeline of the FL and the way she handles politics is interesting
https://www.mangago.zone/read-manga/untouchable_lady/ <- the FL is SUCH A BADASS, ** check this one out, this probably matches the ones you described best!
https://www.mangago.zone/read-manga/like_a_wind_on_a_dry_branch/ <- i think this one's just historical, you'll be super hyped once you're up to date with the list!
https://www.mangago.zone/read-manga/ebony/ <- a top comment described this well, kinda slow until it picks up by ch 10 or 20 where characters get more fleshed out. FL actually needs to figure out problems herself? wild (and also pretty good heh)
https://www.mangago.zone/read-manga/the_blood_of_madam_giselle/ <- This one I'm not sure where it's really going but hyped to see the FL and ML overcome what's to come!
I try to keep track of the shoujo I really like here: https://www.mangago.zone/home/mangalist/896884/ (in case you're feeling up for some of the lighter shoujo-y stories too ;))
*for Like a Wind on a Dry Branch, I didn't mean list I meant newest updated chapter, it's so good!! (hope you check it out if I hype it up heh)
Non-Romance that are also really really good:
https://www.mangago.zone/read-manga/omniscient_reader_s_viewpoint/ <- iconic, art, character development, constellations genre, love love
https://www.mangago.zone/read-manga/yuukoku_no_moriarty/ <- if you're into crime, anti-hero esque vibes, this one's great
https://www.mangago.zone/read-manga/yakusoku_no_neverland/ <- Promised Neverland, I was anime first than manga and it's just so so very good too
You know how it be, I’m getting tired of the fluffy basic isekai storylines. I’m looking for more thought provoking plots like: I saved the heroine’s older brother, shadow queen, death is the only ending for the villainess, kill the villainess, your throne, dictatorship, i imprinted the traitor, please don’t eat me. Is there any any other stories that are similar to these?