I'll try not to be
completely biased.
(Most voices I ranked based on skill, Sayumi (and some others) being an exception, which is why I ranked her so high. =P)
Ai Takahashi: 4 - 4 - 2 - 5 - 4
Aika Mitsui: 2 - 3 - 3 - 3 - 3
Airi Suzuki: 4 - 4 - 4 - 4 - 4
Asami Konno: 2 - 3 - 3 - 3 - 2
Atsuko Inaba: 5 - 2 - 4 - 5 - 5
Aya Matsuura: 5 - 4 - 4 - 3 - 5
Ayumi Shibata: 3 - 4 - 3 - 3 - 3
Chinami Tokunaga: 3 - 3 - 4 - 3 - 5
Chisato Okai: 5 - 4 - 4 - 5 - 3
Chun Li: 3 - 3 - 3 - 2 - 3
Eri Kamei: 3 - 4 - 5 - 5 - 4
Erika Miyoshi: 2 - 3 - 3 - 3 - 3
Erika Umeda: 3 - 5 - 4 - 3 - 3
Erina Mano: 1 - 3 - 2 - 2 - 2
Hitomi Saito: 4 - 4 - 4 - 4 - 4
Hitomi Yoshizawa: 5 - 5 - 5 - 4 - 5
Kanna Arihara: 3 - 3 - 4 - 3 - 3
Kaori Iida: 3 - 4 - 4 - 1 - 2
Kei Yasuda: 5 - 4 - 5 - 4 - 4
Koharu Kusumi: 1 - 2 - 1 - 2 - 4
Lin Qian: 5 - 3 - 5 - 3 - 5
Maasa Sudou: 3 - 4 - 4 - 2 - 3
Mai Hagiwara: 3 - 3 - 4 - 4 - 3
Mai Satoda: 3 - 3 - 4 - 3 - 4
Maimi Yajima: 2 - 5 - 3 - 5 - 4
Makoto Ogawa: 5 - 5 - 5 - 5 - 4
Mari Yaguchi: 5 - 4 - 5 - 4 - 5
Masae Ohtani: 4 - 5 - 4 - 4 - 4
Megumi Murata: 3 - 4 - 4 - 3 - 4
Miki Fujimoto: 5 - 4 - 5 - 3 - 3
Miyabi Natsuyaki: 3 - 5 - 3 - 5 - 4
Momoko Tsugunaga: 2 - 2 - 2 - 4 - 5
Natsumi Abe: 4 - 4 - 4 - 4 - 4
Nozomi Tsuji: 3 - 4 - 5 - 4 - 4
Reina Tanaka: 3 - 5 - 4 - 3 - 5
Rika Ishikawa: 3 - 5 - 5 - 5 - 5
Risa Niigaki: 4 - 5 - 4 - 4 - 5
Risako Sugaya: 2 - 4 - 2 - 2 - 2
Saki Nakajima: 2 - 3 - 3 - 5 - 4
Saki Shimizu: 3 - 3 - 4 - 5 - 3
Sayumi Michishige: 4 - 5 - 5 - 3 - 5
Yui Okada: 3 - 3 - 4 - 3 - 4
Yuki Maeda: 5 - 3 - 2 - 0? - 0?
Yuko Nakazawa: 5 - 5 - 5 - 3 - 4
Yurina Kumai: 2 - 3 - 2 - 3 - 3
Well, I wasn't as biased as I thought.