Idk. Maybe.. Tone Rion?

Yukari

Tree (yes thats an actual utau)

Nekomura Iroha.

Owata Tsuine

He's just a silly guy

Zundamon, Sukone Tei

The goat MAYU

A lot of them are decently popular.. ALSO LIVE LAUGH LOVE SUKONE TEI I AM HER #1 FAN!!!

Xin hua, well, not that she was completely unknown as the 'first taiwanese' but not like we'll see any mitchieM like songs with her going viral or so

suzune fuku (i did NOT know you said One)