They just sound like anime voices

I bet you're talking about like English dubs. The original japanese voices are diverse. Aizen from Bleach, Hakshaku (Millennium Earl) from D. Grayman, Marshal D. Teach from One-piece, and All Might from my hero academia have deep regal voices.

Right, I’ve never seen an anime, probably for exactly this reason.

There are good ones without the stereotypical voices, I recommend Fullmetal Alchemist Brotherhood.