there are many strong females, but most/really strong, brave and who can go against society and everything:
Itaewon Class she kind of isn't good person, she is selfish also, even materialist, sometimes liar and very very badass, but all that makes her realistic and really good character, strong and not usual "perfect" FL
Save Me she goes to hell, and escapes-survives it, this is unusual drama
It's Okay to Not Be Okay same actress, she is so talented and beautiful (she is more strange, crazy and very very uncommon, she has her fears but she is very strong too, and gets what/who (ML) he wants at any cause)
Search: WWW strong business woman, also sex isn't taboo in this drama, it's modern realistic story
Angry Mom
Chicago Typewriter (there is 2 lives of main characters, in past life she was in resistance)
also very strong, independent women who have their own goals, interests and abilities, not only strong-ish romantic interests... but not remember "against society" vibe with them:
Cruel City
I Hear Your Voice
Flower of Evil
The K2 (though she is casted as SFL but in real she is more FL, very strong! casted as FL is just romantic interest, weak uninteresting character)
When the Devil Calls Your Name
Crash Landing on You
Kill It
Go Go Squid 2: Dt. Appledog's Time
Mad Dog
The Innocent Man and Queen of Ambition quite similar stories, ML-SFL story from first one is ML-FL story in second.
Angel's Last Mission: Love
historical:
Arthdal Chronicles amazing drama and amazing females and males )))
The Rise of Phoenixes she is rarely smart and not shadowed by also very smart strong ML
My Country: The New Age
Mr. Queen (modern guy is in body of noblewoman, great drama, great acting, amazing Fl, and great humor)
The Legends she is so badass
Ja Myung Go