Historical drama where the story is about A Badass Woman ???

its hard to tell because you have nothing in your lists that would tell us what you're into but i'd suggest

Faith
The Royal Gambler
Moon Lovers (anyone who tells you Hae Soo isn't badass needs their head read)
Crouching Tiger Hidden Dragon (Movie)
Nirvana in Fire
House of Flying Daggers (Movie)
Arang and the Magistrate
Warrior Baek Dong Soo (not the lead but a side character is a total badass)
The Great Wall (i didn't like it but she's a badass)
Hwang Jin Yi
Night Watchman's Journal

i guess that depends on how you define badass.

when i first watched Faith (my second drama) Eun Soo drove me nuts with her carrying on.  as i rewatched it more and more, and knowing how excellent i am in a crisis (and i AM excellent) i'm not sure i would have dealt with being snatched to the past to operate on a mortally wounded queen with such aplomb.  the more I look at Eun Soo's actions the more wonderful and strong and badass I think she is

and just BTW, i hate the term "badass" it's nonsense

as for Hae Soo in Moon Lovers.  She is, I'm pretty sure, the strongest woman i've ever seen depicted in a korean drama (except maybe Kim Hee Sun's character in Angry Mom).  Every man who wants her and uses her is a domestic violence perpetrator ; her life is at stake 100% of the time.  watching that role is the most stressed I've ever been watching a drama.  the line about walking on thin ice, and the routes she chooses to take, prove her stronger, by FAR, than any man in that drama.

I understand your point, but I still can't compare faith and moon lovers to empress ki and seon duk. There are all great dramas (I haven't seen faith, but I did watch moon lovers and liked it a lot), but from my point of view the difference lies in the fact that both faith and moon lovers are sageuks with a strong female cast, while empress ki and seon duk are sageuks who are centered on them and their development as main leads. When I think of moon lovers, I think of both IU and LJG, same goes for faith / LMH, but when I think of seon duk, seon duk and mishil are the first to stand up.  Don't get me wrong, I love sageuks and historical dramas and I'm not bashing moon lovers (like really, I did enjoy that drama a lot and I also think IU's character was pretty strong), but she didn't carry the drama alone, it wasn't really about her, but about her supporting the male lead's faith throughout the story, opposite to empress ki and seon duk, where the male leads were there in order to support the female cast. This is my take on things, at least.

 Another nice drama with a pretty strong female lead is King's Daughter, Soo Baek Hyang (2013).

I disagree about moon lovers being entirely about Hae Soo, but everyone is entitled to his own opinions. BuBu Jing on the other hand, did focus more on its female lead, Ruxi, though.

Yae no Sakura

The Princess' Man