Quick answer — Tatsuhisa Suzuki voices Ken Ryuuguji in Tokyo Revengers, Hiroomi Nase in Beyond the Boundary, Yutaka Hasebe in Servant x Service and 84 more characters.
Tatsuhisa Suzuki voices Ken Ryuuguji (Tokyo Revengers), Hiroomi Nase (Beyond the Boundary), Yutaka Hasebe (Servant x Service), Alan Stuart (My Next Life as a Villainess: All Routes Lead to Doom!), Ban (The Seven Deadly Sins), Ouma Tokita (KENGAN ASHURA Part I), Rai Nagamori (Those Snow White Notes), Anos Voldigoad (The Misfit of Demon King Academy: History’s Strongest Demon King Reincarnates and Goes to School with His Descendants) and 79 more.
Ken Ryuuguji is voiced in Japanese by Tatsuhisa Suzuki.