Children of nobody. Sadly underrated and I don't know whyyyy. For me it is THE BEST K-drama

it's a movie but Peppermint Candy

Sungkyunkwan Scandal

When We Were Young

The Story of Ming Lan (I'll be finishing up with this one soon, and I absolutely love it and recommend it.)

Mengfei comes Cross

Nirvana on fire

Empress ki

The dark lord

so many good ones on your list

Story of yanxi palace

Children of Nobody

Save Me

Woman of Dignity 

Midnight Runners

The Divine Fury

My Dear Warrior

Prison Playbook

Fight for My Way

To Each His Own 

My Secret Romance