Personally, I don’t read too many straight ones however, I recently read this really good one called veil and really enjoyed it.
Not a manhwa or historical but this is one of the best shoujo I've ever read
https://www.mangago.zone/read-manga/karekano/
https://www.mangago.zone/read-manga/nice_to_meet_you/
↑ not historical !
https://www.mangago.zone/read-manga/doctor_elise/
↑ the classic
https://www.mangago.zone/read-manga/i_stole_the_male_lead_s_first_night/
https://www.mangago.zone/read-manga/with_one_day_left_i_ll_break_all_the_destruction_flags_serves_you_right_rta_24_hour_record/
https://www.mangago.zone/read-manga/sica_wolf/
https://www.mangago.zone/read-manga/the_villain_s_savior/
Hi~ can you recommend me some Completed Straight manhwas? I also prefer if it's a historical one and has a good art style. Thank you.