Any drama or movie where the second lead did despicable and evil things to get the girl.
For e.g. Missing you, Harry was crazy for the female lead, he even murdered people for her. Chinese drama, Memory Lost, he plotted a twist in order to get her. Also, The Suspicious Housekeeper, he murdered her whole family to possess her. He doesn't necessarily need to be violent, but he could be ruining lives or any manipulations to get the girl. Dinner mate is also heading to that direction. Born Again also fell into that trope.
I am only looking for modern drama, so no historical ones. Also, no Thai shows, they are too much for my taste.