Quick answer — Eiichirou Tokumoto voices Grimsby Keane in Black Butler: Book of Murder, Godan Matsushita in Angel Beats!, Itou in Kokoro Connect ~ The OVAs and 5 more characters.
Eiichirou Tokumoto voices Grimsby Keane (Black Butler: Book of Murder), Godan Matsushita (Angel Beats!), Itou (Kokoro Connect ~ The OVAs), Aoki no Chichi (Kokoro Connect), Fumihiro Fuse (Baka and Test - Summon the Beasts 2), Fuyumi no Chichi (Blood Lad), Leonardo (Galilei Donna), Haga (DRAMAtical Murder).
Grimsby Keane is voiced in Japanese by Eiichirou Tokumoto.
