Come and Hug Me - Son of a serial killer, daughter of one of his victims.
Doctor John - It gets a bit annoying towards the end but it has drama, interesting moral discussions, some mystery, romance (though not always the main focus) and it wraps it up relatively ok.
Final Fantasy XIV: Hikari no Otousan - The story of a son attempting to get to know his father. A short series that has a happy end.
Healer - My all time favourite. Mystery, action, romance, no love triangles and really awesome main leads.
Melting Me Softly - different. Mystery, romance, a tolerable, rather hilarious love triangle.
Panda and Hedgehog - bromance, romance, mystery, love triangle that one can cope with. I love this one for the bromance.
The King: Eternal Monarch - Love it except for the obvious, OTT product placement.