During my almost 26 years of being an otaku, I heard some characters with similar voices and I begin insulting those characters. For example, Burnerman from Megaman NT Warrior shared the attitude and voice of everybody's favorite half dog demon and Brock from Pokemon shares the same voice as Seto Kiaba from YuGiOh and Gourry from Slayers, and once had a Gourry moment in an episode or movie of Pokemon.
Back in the 80s, some actors used the same voice in GI Joe and Transformers. But, Frank Welker used Soundwave's voice as Dr. Claw without the Vocoder effect.
My advice, listen to the voices and you can find your favorite voice actors in weird anime series or TV shows