https://www.mangago.me/read-manga/drunk_in_love/
the most possessive seme i've ever encounrered: https://www.mangago.me/read-manga/roses_and_champagne/
https://www.mangago.me/read-manga/work_fight_and_love/
codeana also has this trope! but it's not in the manwha yet. just trust me as a novel reader haha
https://www.mangago.me/read-manga/codename_anastasia/
this one really leans into the psychological side with 0 redemption... there's more like these but i didn't think this was the type of story you wanted https://www.mangago.me/read-manga/obey_me/
let me recommend you these two that I finished reading this week:
https://www.mangago.me/read-manga/even_if_you_don_t_love_me/
T/W: R*pe, SA, psycho thingy, violence/gore (few ch), angst
https://www.mangago.me/read-manga/shadow_crown/
CW: shitty plot, so don't take it seriously. it's shounen ai so the pacing is rather funny, than the underlying dark themes
Need a yaoi manga where the seme is really possesive and obsessive, stalker vibe, kindaa "I'm lock you up, your not going anywhere" type
Of course for research purpose