I need another Korean drama with an amazing and great OST like

- Another Miss Oh

- Secret Garden

- Smile, You

- I Hear Your Voice

- City Hall

- White Christmas

- Fated to Love You

- Oh My Venus

- It's Okay, That's Love

- Goblin

Does anyone know any kdramas with good ost?

I only watched a few of the dramas you mentioned but this could fit:
    
I thought all of this OSTs were outstanding good
   
Masters Sun
Faith
Gu Family Book
Moon Lovers
Decendants of the sun
- The king in love 
- Rebel: Thief Who Stole the People
- healer (maybe)
- Hwarang 
- Love in the Moonlight ( definitely)
- Shopping king Louis
-t he heirs (oh yes)
Healer OST wasn't that great

Reply 1988   Preview:
Moon Lovers OST is the OST of my life (especially that Im Sunhae song)
Who Are You - School 2015
Kill Me Heal Me
White Christmas
Who Are You - School 2015
A Gentleman's Dignity
Kill Me Heal Me
Hwarang
Stranger
Signal
DOTS
Hit the Top (aka The Best Hit)
Love In the Moonlight
Moonlovers Scarlet Heart
Ruler: Master of the Mask (the drama itself is lacking in many aspects, but the OST is pretty good, esp. "Star and Sun," by Kei)
The Legend of the Blue Sea
Stranger/Secret Forest (I LOVE "Dust," by Averua)