Thread:CureHibiki/@comment-5103036-20140820125506/@comment-25034020-20141004015939

Okay I just looked up "Deep voiced Japanese Female seiyuus" and here's what I found:
 * Ami Koshimizu
 * Sayaka Ohara who plays Erza Scarlet in Fairy Tail has somewhat of a deep, mature voice.
 * Junko Noda who plays Zakuro in Tokyo Mew Mew
 * Junko Takeuchi - She does the voice for Naruto Uzumaki in the series Naruto, and Naruto Shippuden

That's all I found.