Not really calm and controlled but maybe you would like Flowers are bait for the yandere-ish ml who is also possessive and obsessive and loves the FL, as you listed. Or, Only Hope, but the ML isn't yandere-ish from what I remember, might not fit what you're looking for. Maybe, if you don't mind that it's not modern, you might like How to Survive as a Maid in a Horror Game. The ML fits your criteria I would say. Or a manga, Hotaru no yomeiri, though the ML isn't really calm, more crazy.

Guys do you have any reccos for manga/manhwa with an ML like Taeha who's kinda obsessive, possessive, plans schemes, loves the FL so so much, yandere-ish but is usually calm and controlled? They dont have to be puppy-like to the FL (i prefer they're not). Thank you!
I just really need to read smth else because this snail pace is KILLING ME ┗( T﹏T )┛