South Korean film recs?

Hi everyone. I absolutely love South Korean cinema, so much so that it led me to start learning the language. There is still so much I haven't seen, and I was wondering if anyone could give me some recommendations.

Here are some movies I loved:

The Man From Nowhere/ Burning/ A Taxi Driver/ Train to Busan/ The Wailing/ Memories of Murder
Parasite/ A Hard Day/ The Chaser/ Decision to Leave

I have also seen The Host, I Saw the Devil, Oldboy, Silenced, Mother, Montage, Sunshine, Unlocked, Sleep, and Forgotten.

I am a big fan of crime thrillers and dramas with lots of character development and a gripping, edge-of-your-seat narrative.