I would recommend mouse 100%. I love kdramas with mystery/crime etc

Signal and Watcher
Really love the mystery/crime/thriller vibe too. 

Mr. Sunshine and The Uncanny Counter 

My Mister

Extraordinary Attorney Woo

Reply 1997

Father is Strange

Mad Dog

It's okay it's love

Crash landing on you

Healer

legend of the blue sea

moon embracing the sun

the crowned clown and iljimae. I haven't finished them yet, but they are historical dramas

I second "Vincenzo".

I revelled in the dark (black?) humour of this crime drama.

Mystic Pop up Bar

While you were sleeping 

Weightlifting fairy kim bok joo 

the  tale of nokdu