
Quick answer — Yoshito Yasuhara voices Otto Heckel in Monster, Jimmy Kurosaki in Cyberpunk: Edgerunners, Nolnoa in Witch Hat Atelier and 11 more characters.
Yoshito Yasuhara voices Otto Heckel (Monster), Jimmy Kurosaki (Cyberpunk: Edgerunners), Nolnoa (Witch Hat Atelier), Aldo Morini (Violet Evergarden: Special), James Coleman (Great Pretender), Louis 16-sei (Lady Oscar: The Rose of Versailles), Toshiyuki Kadokura (Golden Kamuy Season 2), Lui (Castle in the Sky) and 6 more.
Otto Heckel is voiced in Japanese by Yoshito Yasuhara.