1)
Akina Nakamori
She isn't my favorite singer, far from my top 10 but her voice is just amazing. She can do no wrong
2)
Ami Suzuki
Amigo's vocal range is...
questionable 
But I just love how her voice sounds, it always sounds nice to me.
3)
Akiddo Wada
I don't really like most of her music but her voice is so POWERFUL! and...manly? It's great
