I think Matsudappoiyo has gotten really popular, especially from what I see here, but anyhoo, utau I like are kind of hard to find lol, but only due to a couple factors
-Anna Nyui (one of the most realistic voices I've heard, competes with Meiji for sure ^^)
-Ouka Alice(not too much of her on YT, Niconico might have more, nice soft voice like hiyori)
-Samura Tomi(Kyaami/Cillia's utau. I'd expect her utau to be much more popular, but Kyaami doesn't do much with her, sadly)
-Amaga Eru(Very nice voice ^^ Ever heard of Wonder-Go-Round?)
-The Shirakane family(I hear so little covers feauturing hiyori nowadays, even when I looked on Niconico there were few for some reason, let alone her relatives like Himeka, Hikari, Hisui)
-Hoshisuisyo(Beautiful design and voice that sounds quite similar to Meiji, actually, in voice and quality ^^)
-Anna Nyui (one of the most realistic voices I've heard, competes with Meiji for sure ^^)
-Ouka Alice(not too much of her on YT, Niconico might have more, nice soft voice like hiyori)
-Samura Tomi(Kyaami/Cillia's utau. I'd expect her utau to be much more popular, but Kyaami doesn't do much with her, sadly)
-Amaga Eru(Very nice voice ^^ Ever heard of Wonder-Go-Round?)
-The Shirakane family(I hear so little covers feauturing hiyori nowadays, even when I looked on Niconico there were few for some reason, let alone her relatives like Himeka, Hikari, Hisui)
-Hoshisuisyo(Beautiful design and voice that sounds quite similar to Meiji, actually, in voice and quality ^^)