Shows with action, fighting, crime solving, gangsters or spies requested

Kdrama recommendations would be appreciated as I'm newish to the genre.

I have seen the following and they are listed from best to worst in my opinion, although enjoyed all of them except the ending of the last one.

1. Taxi Driver
2. Lawless Lawyer
3. K2
4. My Name
5. Vagabond

Not looking for too much romance or comedy, a bit is fine. Shows that contain one or more of the following would be good - action, fighting scenes, crime solving, gangsters and spies.