Good mystery dramas?

I loved Stranger. The characters were exceptionally level-headed, the script brilliant.

"Annoying, "can be somewhat vague. What specifically do you define as annoying? I dislike loud and rash characters the most - this is why I loved stranger, the protagonist does so much quiet observations, it's fun to watch.

K-Drama; The guest, Big Issue, Stranger, Less than Evil, signal 

C-Drama: Candle in tomb, Snail falls in Love, the golden eyes(does have annoying chars), The Cold case,  Detective L(airing), 

J-Drama: Miss Sherlock, Ouroboros, Strawberry night, Tantei no tantei, Ishi no mayu, 

Thai Drama: The crown princess,  Bangkok Vampire (airing), Mook Liam Petch (annoying char in all)

Hong Kong Drama; The unholy alliance, The fist within four walls, the ghetto- fabulous lady (minor annoying chars)

Quote me if u need more recs [^-^]

Medical examiner Dr. Qin

• Signal
• Tunnel
• Stranger
• Kill me heal me (it has romance as well, but their  childhood story is quite intriguing)
• N no tame ni
• Maou
• Ryusei no kizuna
• Kazoku game
• Liar Game