nobara to pretender, Diamond dust, ghosts nocturne (cr jade the goat), master peace (also under peace of god), bones and petals, hime muko are a few that come to my mind
https://www.mangago.me/read-manga/otoyomegatari/
https://www.mangago.me/read-manga/the_witch_and_the_beast/
https://www.mangago.me/read-manga/hokuhokusei_ni_kumo_to_ike/
https://www.mangago.me/read-manga/quartz_no_oukoku/
https://www.mangago.me/read-manga/bibliomania/
https://www.mangago.me/read-manga/meaheim/
https://www.mangago.me/read-manga/mia_neverland_above_the_clouds/
I personally found these to be very beautiful
I decided that I wanna make a list of pretty manga (manhwa might be a different undertaking later). I'm talking like Witch Hat Atelier or Kuutei Dragons levels of art. Plot can be absolute trash, but as long as the art is gourmet, Im adding it