Recently been looking around Vtuber/Vsingers and found these are not on the wiki
Suzuna Nagihara - Riot Music (same as new Cocoa)
At time of posting has 68.4k subs
She speaks primarily Japanese but can respond in English decently. Wide range of voice and talented at singing (check out her debut song Uninstall). Nicknamed by some EN fans as Mecha Queen
Her Streams are singing streams with piano played by her.
Saki Ashizawa - Riot Music
At time of posting 149k subs
She speaks Japanese and has a powerful singing voice. She likes to stream some games from time to time but is primarily singing with guitar played by her.
QuonTama - Guild CQ
At time of posting has 64.1k subs
Her Twitter: https://twitter.com/quon01tama
Her Facebook: https://www.facebook.com/%E4%B9%85%E9%81%A0%E3%81%9F%E3%81%BE-QuonTama-113797037412914/
She speaks Japanese, her singing is imo extremely good and deserves more attention. She streams various games such as Apex, Minecraft, Zelda Breath of the Wild and has singing streams at least once or twice a week. She loves to sing and will start singing while playing apex randomly.
I do not know if Reality Streaming App can be considered a video service as they do not have archives but I'll put it here anyway.
Himitsu Kano - LiveUnion (Same as Hachi)
At time of posting has 1.5k subs
Reality streaming app: https://reality.app/profile/3749bca3
At time of posting 21k followers
Her Twitter: https://twitter.com/himitsu_honey
She speaks both English and Japanese
Minase Nagi - LiveUnion
At time of posting 730 subs
At time of posting 10k followers
She speaks Japanese although from her twitter and her debut song she can sing/respond in fluent English.
EDIT: Just realized I posted this in General and not Requests/Suggestions. Sorry!