
Quick answer — Keaton Yamada voices Alain de Soisson in Lady Oscar: The Rose of Versailles, Jerry Boot in Anne of Green Gables, Higuma in City Hunter 2 and 2 more characters.
Keaton Yamada voices Alain de Soisson (Lady Oscar: The Rose of Versailles), Jerry Boot (Anne of Green Gables), Higuma (City Hunter 2), Tochiro Ooyama (Captain Harlock Space Pirate), Zoll (Captain Harlock Space Pirate).
Alain de Soisson is voiced in Japanese by Keaton Yamada.