
Quick answer — Keiichi Noda voices Fritz Joseph Bittenfeld in Legend of the Galactic Heroes, Slash in Mahoromatic: Automatic Maiden, Tetsuya Tsurugi in Mazinger Z and 2 more characters.
Keiichi Noda voices Fritz Joseph Bittenfeld (Legend of the Galactic Heroes), Slash (Mahoromatic: Automatic Maiden), Tetsuya Tsurugi (Mazinger Z), Ioneos (This Ugly Yet Beautiful World), Toranosuke Yoshida (PERSONA5 the Animation).
Fritz Joseph Bittenfeld is voiced in Japanese by Keiichi Noda.