Suggestions by @kamsismith

Yoo Hai-jin

as Maestro Baek in Heavenly Harmonies

Score: +1

Yang Ik-june

as Maestro Baek in Heavenly Harmonies

Score: +1

Yoo Jae-suk

as Maestro Baek in Heavenly Harmonies

Score: +1

Ma Dong-seok

as Maestro Baek in Heavenly Harmonies

Score: +1

Song Kang-ho

as Maestro Baek in Heavenly Harmonies

Score: +1

Paul Sun-Hyung Lee

as Maestro Baek in Heavenly Harmonies

Score: +1

Lee Byung-hun

as Maestro Baek in Heavenly Harmonies

Score: +1

Ju Ji-hoon

as Dokkaebi in Heavenly Harmonies

Score: +1

Rich Ting

as Dokkaebi in Heavenly Harmonies

Score: +1

Kim Jae-uck

as Dokkaebi in Heavenly Harmonies

Score: +1

Gary(Kang hee gun)

as Dokkaebi in Heavenly Harmonies

Score: +1

Kim Nam-gil

as Dokkaebi in Heavenly Harmonies

Score: +1

Zo In-sung

as Dokkaebi in Heavenly Harmonies

Score: +1

Gang Dong-won

as Dokkaebi in Heavenly Harmonies

Score: +1

Yoo Ji-tae

as Dokkaebi in Heavenly Harmonies

Score: +1

Brian Tee

as Dokkaebi in Heavenly Harmonies

Score: +1

Kim Hyunjung (Seola)

as Yeonhwa in Heavenly Harmonies

Score: +1

Moonbyul

as Yeonhwa in Heavenly Harmonies

Score: +1

IU (Lee Ji-eun)

as Yeonhwa in Heavenly Harmonies

Score: +1

Hoyeon

as Yeonhwa in Heavenly Harmonies

Score: +1