Suggestions by @NoMan

Hoyeon

as Ryeom So-young in Lady Bullet

Shin Ha-kyun

as Gwak Mal-chin in Han

Jang Dong-gun

as Jin Baek-hyeon in Han

Ji Sung

as Ran Jae-sang in Han

Kim Hyun-joong

as Da Chan-wook in Han

Satomi Ishihara

as Yori Kataoka in Han

Yoo Ah-in

as Cheon Ha-joon in Han

Woo Hyeon

as Jeong Beom-seok in Han

Lee Jin-uk

as Tan Myung-dae in Han

Lee Min-ho

as Pyo Yong-sun in Han

Lee Jung-jae

as Roe Kyu-bong in Han

Han So-hee

as Geum Jae-sang in Han

Kumiko Aso

as Emiko Sakata in The Silent Sea (J-Drama)

Youki Kudoh

as Director Tanigawa in The Silent Sea (J-Drama)

Eri Fukatsu

as Rika Okamoto in The Silent Sea (J-Drama)

Masahiro Inoue

as Yuki Kitagawa in The Silent Sea (J-Drama)

Hiroki Hasegawa

as Tsuneo Miyasaki in The Silent Sea (J-Drama)

Kim Si-a

as Ji-soo in My Virtual Escape (K-Drama)

Yoo Jae-myung

as Chae Nam-gi in My Virtual Escape (K-Drama)

Masataka Kubota

as Ichirou Igarashi in Sweet Home (J-Drama)