It would be nice to have more than the four voice options (two feminine and two masculine). It is kinda blah to pigeonholed in to the four voices and tbh there isn't a lot of difference between the two female voices.

Maybe some voices with other accents as well.

euro-centric options that might be good and fit your typical D&D setting: Scottish, Irish, Spanish, Greek and Italian

or if you want to go really exotic and decidedly non-euro Israeli (just hire Gal Gadot for the female voice lol)