
Quick answer — Tetsuharu Oota voices Sagaru Yamazaki in Gintama, Cikinaro in Utawarerumono, Charlie in Golgo 13 (TV) and 6 more characters.
Tetsuharu Oota voices Sagaru Yamazaki (Gintama), Cikinaro (Utawarerumono), Charlie (Golgo 13 (TV)), Karaage (Nagasarete Airanto), Kusuo Masukodera (Armed Girl's Machiavellism), Ichiya (BUCCHIGIRI?!), Edgar Teek (Muhyo & Roji's Bureau of Supernatural Investigation), Palpol (The Kingdoms of Ruin) and 1 more.
Sagaru Yamazaki is voiced in Japanese by Tetsuharu Oota.