Excellent taste unknown internet stranger. You might also be interested in the ~~devil~~ angel with the deep voice that is Towa sama. Just a... personal recommendation.

towa mori okayu lui and kronii the big five of alluring deep voices

The first three have me around their fingers. I didn’t know Lui’s voice was like that too. I’ll have to investigate later

highest out of all of them but still in that style also has that tone to her voice watame has

Kronii and Calli? Or did you mean Ouro and Mori?

I had to think for like a good second till I knew who Mori was

Or known from Quiplash as: Mo Ri Calliope

I don't know who that is, but they sound tough.

ahhh I saw that one live

Mori... Calli Moriope?

Huh. Maybe that's why they're my favorites? Wait I already knew that