Help Please?! Villains

VOICE - Do see this drama honestly the best villain in kdrama history

Kim jae wook's phenomenal acting makes him my fav actor, do see more of his works such as Pygmalion's love, antique, who are you, coffee prince he's so versatile 

In addition check  out some of these:

• Queen Seondeok - Mishil is the ultimate badass smartest Villain ever
• A story of a Man - one of my fave villains ever
• Love me if you dare
• The Tunnel
• The devil / Maou
• Morror of the Witch 
• Others: Meloholic, shining inheritance, scandal, come jang bori is here, 
• Movies: old boy, The Chaser, Cherry returns, old Boy, Haunters, Hwayi, 

You should watch Signal  totally fitting of what you are looking for.

All below are Japanese

Hidarame Tantei Eye
Quiz show 2
Kazoku Game (the bad guy turns out to be a good guy ..so may not fit your criteria but please do watch this at some point)
Brainman
Kaitou Tantei Yamaneko (the bad guy doesnt reveal himself until late in the series but trust me its a twist that will leave you angry and admiring the writers at the same time)
Bloody Monday 1 and 2

To an exent
Ouroburos.

I have already watched some of these but there are some that are on my PTW list that I totally forgot about! Def gonna watch those first.

 tita_cba:

The Scholar Who Walks the Night  has the most interesting villain I've watched. 

I tried but I couldn't get past epi 2

That bad guy was sexy tho

The King2Hearts!!