Try radio storm
Good horror + god tier art is much easier found in manga. That said here are a few good manhwa that ik
https://www.mangago.me/read-manga/44th_period_survival_class/
https://www.mangago.me/read-manga/bastard_hwang_youngchan/
https://www.mangago.me/read-manga/classmate_writers_scans/
https://www.mangago.me/read-manga/look_alike_daughter/
https://www.mangago.me/read-manga/tales_of_the_unusual/
https://www.mangago.me/read-manga/chasing_tails/
https://www.mangago.me/read-manga/my_girlfriend/
Dont search radio storm, its a yaoi
Pls recommend a good horror manhwa with god tier art style pls