Male actors:

Jang Keunsuk (you are beautiful)

Kang Jihwan (Hong Gildong)

Lee Seunggi (My girlfriend is gumbio)

Joowon (Bridal mask and Good doctor)

Jisung (Kill me heal me)


Female actress 

Han hyo joo (Dongyi and W)

Moon chaewon (Nice man)

Bae Yong Joon (Dream High)

Ji Yoon Ho (Cheese in the Trap)

Kim Woo Bin (Heirs, School 2013)

Park Hae Jin (Man to Man, Cheese in the Trap, Doctor Stranger)

Jeon Sung Woo (Doubtful Victory)

Yoon Kyun Sang (Doubtful Victory, While you were sleeping, Doctors, Pinocchio)

Han Jae Suk (Meloholic)

Han Joo Wan (Meloholic, School 2017)

Jung Junho (from DBSK, Meloholic)

Park Hyung Shik (Strong Woman Do Bong Soon, Heirs)

Jang Mi Kwan(Strong woman Do Bong Soon, it was his debut but it was amazing)

Yoo Seung Ho (Remember, I am not a robot)

Seo In Guk (Shopping King Louie, Hello monster, King of High school)

Ji Soo (Strong woman Do Bong Soon, Weightlifting Fairy Kim Bok Joo, Sassy go go, To the Beautiful you)

Nam Joo Hyuk (Weightlifting Fairy Kim Bok Joo, Cheese in the Trap, Who are you: school 2015)

Ji Chang Wook (whirlwind girl 2, Healer)

Lee Jong Suk (While you were sleeping, W, Pinocchio, Doctor Stranger, I hear your voice, School 2013, Secret Garden, VIP, No breathing)

Lee Hyun Woo (Moorim School, To the beautiful you)

Kim Min Suk (Doctors, Who are you: school 2015)

Ji Chang Wook

Lee Dong Wook

Lee Jong Suk

Kim Woo Bin

Gong Yoo

Ma Dong Suk

Lee Kyu Hyung 

Jo Seung Woo

Jo In Sung:  I can't explain why I didn't like him the first time I saw him in Frozen Flower but later as I watched That Winter the Wind Blows I had to admit that he was the best Korean actor I'd seen. It's just that he's capable of incarnating all emotions he wants, especially the most drastic. Also I love him in That's OK, This Is Love.

Ji Sung: Also one of the most talented of Korean actors. I don't know many actors capable of incarnating some many really different personalities of a same person in a drama as he in Kill Me, Heal Me. He absolutely transformed representing every character. Also he's wonderful in Secret Love.

Song Hye Kyo: Some people say that she's popular only because of her beauty and that she's even too beautiful. I don't agree. She always shows a strong character and wonderful acting skills, I was fascinated by her role in That Winter the Wind Blows.

Lee Dong Wook: Somehow very charming and I love his comic and dramatic skills - they are really contrasting. He's amazing in Hotel King (because of the drastic emotional power of his character) and Goblin (because of strong comic power).

Yoo Seung Ho: remind me Lee Dong Wook :D A great dramatic power.

Woo Do Hwan: reminds me my cousin ;) Also incredible acting skills and hostile charm. One of the best young Asian actors.

Choi Jin Hyuk, Jang Geun Suk, Song Seung Hoon, Wonbin, Jang hyuk and Nam Goong Min.

song joong ki and lee jun ki... :)

Hyun Bin

Lee Min Ho

Ji Chang Wook

Jo seung woo

Jung kyung ho

Jang hyuk

Namgoong Min (The Undateables, Chief Kim, Beautiful Gong Shim)

Lee Jun Ki (Lawless Attorney, Criminal Minds, Moon Lovers)

Park Hae Jin (Man to Man, Bad Guys, Cheese in the Trap)

Joo Won (Bridal Mask, Good Doctor)

Waaa, I have too many but the mains would be:
Yoo Seung Ho (I'm Not A Robot, The Emperor: Owner of the Mask, Remember, Missing You)
Lee Dong Wook (Goblin, Life)
Kim Jae Wook (Voice, The Guest, Temperature Of Love)
Kim Jung Hyun (Time, Eulachacha Waikiki)
Seo Kang Joon (Are You Human Too?, Entourage, The Third Charm, Cheese In The Trap)
Lee Yi Kyung (Eulachacha Waikiki, Partners For Justice, Children of Nobody)
Woo Do Hwan (The Great Seducer, Mad Dog, Save Me)
Lee Jong Suk (The Hymn Of Death, While You Were Sleeping, W)
Ahn Jae Hyun (The Beauty Inside, Blood)
Lee Jun Ho (Just Between Lovers, Wok Of Love)

Byun Yo Han (Mr. Sunshine, Six Flying Dragons)

Yoo Yeon Seok (Mr. Sunshine, Romantic Doctor Teacher Kim)

Park Bo Gum (Reply 1988, Moonlight Drawn by Clouds)

Lee Jong Suk (Pinocchio, W: Two Worlds, While You Were Sleeping, I Hear Your Voice)

Yoon Gyun Sang (Pinocchio, Rebel: Thief Who Stole People)

Jang Ki Yong (Go Back Couple, My Mister)

Kim Sun Ho (Strongest Deliveryman, Two Cops, 100 Days My Prince)

Yoon Doo Joon (Radio Romance, Let's Eat 2)

hyun bin

kim myung min

kim jae wook

It is "Joo Jin-mo" because he acted very well in the role of Wang Yoo especially showed leadership qualities by acting. 

1. Park Hae Jin

2. Kim Jae Wook

3. Lee Jong Suk

4. Lee Seung Gi

5. Gong Myung