BigBanana's Things

A manga where the FL is a demon who is kind of OP, she is possessing the body of some noble lady or something of the sort who made a deal with her. She trains the 2nd knights order so they can beat the 1st knights in some kind of competition, she speaks Elvish to the Elf prince or something which shocks him and impresses him and stuff and helps with a negotiation between their kingdoms. It was something like that, any idea? She is basically OP in every way, magic, swordsmanship, languages, etc and she is blunt but smart and stuff.

I can't remember the name but basically the FL lives with her mom who is kind of abusive and she reincarnates or something of the sort and at some point somewhere in the beginning she goes to the temple to meet a duke (probably of the north) and she offers him an alliance and basically calls herself a useful tool or something

The Uke is Overpowered. Uke only allows Seme to take control because he loves them. (Yaoi or Straight or Yuri)

or

The FL is strong and at the same level or stronger than her partner. (can be Yuri or Straight)

or

The ML is powerful but disliked and we slowly get to know him and find out he is misunderstood. (Enemies to lovers, Yaoi or Straight)

and

For all if these It would be nice to have some angst, some fluff, some healing, and some tragic painful heart wrenching content or backstories which hopefully ends in happiness. (Not required)

Office setting or something of the sort, kind of hierarchy based.
The ML is the 'boss' so to speak or someone who is very powerful and he is very cold & hard on his subordinates but is secretly 10x harder on himself and overworks and stuff & maybe tragic backstory.
If ML is a bottom I'd like that, but top is okay too. I just want some fluff and comfort and healing and angst.
It would be preferable if MC (Female or Male) is ML's subordinate.

Are there any manga where the bottom is physically, socially, financially, etc... more powerful than the top & the bottom kind of protects the top & stuff?
Also with some nice slow burn ya know? Not super fast paced, not too slow either, but they don't immediately fall in love. And maybe a bit of tragedy or angst backstories or otherwise?