Responses

Cheese in Trap (all those +300 chapters are so worth it mark my words. He is unique, but manipulative af )
Flower Of Evil
100% Perfect Girl
Oujitachi wa Izonsuru
Watashi no... Megane-kun (Too weird for me to be enjoyable, but it is what you are looking for)
And also Kirai might be something you like as well.

http://www.mangago.zone/home/mangalist/591398/
the yanderes are male but they're mostly (not all) BL
does anybody know some good yandere manga's like secret alliance it doesnt matter if its yaoi or not as long as the yandere is male