I've watched a few. I'm subscribed to a lot...
Eilen? Eiren? Before the channel was sold off to become akari mirai's. And that one related Vtuber who is now a combi channel with her.
Kaguya Luna, though content has dried up since forever ago. Kizuna AI, a bit, she's not very exciting. Siro.
For some reason, I have an affinity for "unusual or overdone dialects". Kaguya Luna. Himehina. And 東雲れらこ