I think Shadowheart is well-acted, but she sounds so brittle and brutish... can't imagine finding that sexy, though it is pleasant in its way and fitting and distinctive. I like it, but it's never gonna make me question my sexuality; the only thing that's ever come close to that has been Rachel Bloom poledancing. Then again, maybe there are sexy SH scenes I missed because I haven't played a gay PC yet? Feel free to tell me if so, and/or link a YT video.
Amelia Tyler (narrator), Jeanette, Velvet Velour--now THOSE are sexy voices, with Jeanette being the cutest-sounding and Amelia/VV sounding all woman.
Astarion, however... gd, Neil Newbon is crushing it. Much like my PCs would like to crush Astarion with their insides. He's like Tim Curry or David Bowie--everyone wants a piece of that whether they will admit it or not. The thirst is real.