Korean drama about revenge ?

Queen of ambition,
innocent man,
mask,
monster (2016),
secret (2013),
goodbye Mr. Black,
I don't recommend all of them though. but the first and second ones are amazing! secret is also good. Monster is totaly makjang and it's longer ( 50 episodes).

Gap Dong
Remember – War of the Son

Secret (2013)
A Man's Story (2009)
Bad Guy (2010), 
Green Rose (2005)
Iljimae (2008)
The Devil (2007)
The Scale of Providence (2008)
Time between Dog and Wolf (2007)
Junseon Gunman (2014)
Sorry for all the old dramas... I've been watching kdramas since 2010.

Mask
Birth Of A Beauty

Others that are kind of:
Le Jun Kai (Chinese) 
Cunning Single Lady
Please Come Back, Mister

Haven`t Seen:
Innocent Man
Secret

The Equator Man
Shark (Revenge, but focused too little on it i think)
Five Fingers
Resurrection
Bridal Mask (Too long and i only liked the first 6 episodes, the rest was just ok)

Yellow Boots (Ice Adonis) - same female lead as the one in The promise
The Women's Room
Secrets of Women

Can You Hear My Heart!