The top name on the list? Nazuka Kaori, the big, athletic seiyuu with the tiny voice who played Eureka in Eureka Seven. "Broad Shoulders-san" has nine votes.
Next comes Kobayashi Yuu. The tall, elegant and strange "Master Painter" has seven votes.
Next, tied at six votes each, come Tanaka Rie and Horie Yui.
Here is a table showing photos of all the seiyuus who have received more than one vote so far:
Nazuka Kaori 9
Kobayashi Yuu 7
Tanaka Rie 6
Horie Yui 6
Chihara Minori 5
Taketatsu Ayana 5
Kaida Yuuko 4
Tomatsu Haruka 4
Hirano Aya 3
Mizuki Nana 3
Akesaka Satomi 2
Inoue Kikuko 2
Inoue Marina 2
Kitamura Eri 2
Kotobuki Minako 2
Nakahara Mai 2
Noto Mamiko 2
Takahashi Chiaki 2
Toyoguchi Megumi 2
Yuzuki Ryouka 2
Of course, different photos can make people look quite different. These are just the best small photos of these seiyuus that I have. And some people look a lot better in motion than they ever can in a still photo.
The seiyuus receiving one vote were: Asano Masumi, Asumi Kana, Fuken Misato, Fukui Yukari, Gotou Saori, Hazuki Erina, Hikasa Youko, Kadowaki Mai, Kakazu Yumi, Kawaragi Shiho, Koshimizu Ami, Kuwashima Houko, Kuwatani Natsuko, Nakajima Megumi, Paku Romi, Sanada Asami, Sawashiro Miyuki, Shiina Hekiru, Shimizu Kaori, Shiraishi Ryouko, Takeuchi Atsuko, Tamura Mutsumi, Tamura Yukari, Tanaka Atsuko, Ochiai Yurika (Hase Yurina), and Tatsumi Yuiko (Taketatsu Ayana's co-star in KissxSis).
There were a few interesting comments on 2channel. People commented that someone like Taketatsu was cute rather than beautiful. A couple of people said Hirano Aya was never pretty at all. In my opinion, those two must be blinded by their other prejudices against her, because she is at least cute and in my opinion beautiful.
Of course, everyone will have a different opinion. I personally come from the basic point of view that all women are attractive, each in her own way. But to answer the question, I'd agree with 2channel on Kobayashi Yuu, Chihara Minori, Kaida Yuuko, Hirano Aya, Nakahara Mai, Takahashi Chiaki, Yuzuki Ryouka, Tanaka Rie, and Inoue Marina -- although Marina's prominent pixie ears may disqualify her, lol, lovely as she is.
But I have never understood why Horie Yui is thought so pretty, or Mizuki Nana. It seems to me people are confusing personality and talent with beauty. The same goes for Kuwashima Houko and Sawashiro Miyuki -- two of my favorite seiyuus, but for their voice-work, not their beauty. And people like Kotobuki Minako and Hikasa Youko have a kind of beauty that is maybe too Western or too conventional for my eye. Everyone's eyes are different.
I would move a number of names up in the list. First among them would be Gotou Saori, whose exotic beauty has always struck me. I like her strange fey personality, too. Shiina Hekiru, who is no longer doing much seiyuu work, has a very individual beauty. And Paku Romi seems almost the definition of "beautiful" to me.
And I would add some names. The first would be Endou Aya, who to me may be the most beautiful of all seiyuus. And with her now-regular teeth, Katou Emiri could join the list. And so could Sakamoto Maaya.
Of course, there are many cute seiyuus, like Oogame Asuka, Nanjou Yoshino, Taketatsu Ayana, Yuuki Aoi, Chiba Saeko, Sanpei Yuuko, Asumi Kana, Chiwa Saitou, Fukuen Misato, Fukuhara Kaori...the list goes on. But "beautiful" is something different, involving a certain grandeur, and regularity of features, it seems to me. English and Japanese may differ here, but to me bijin/kawaii and beautiful/cute make quite similar distinctions in their cultural contexts.
The 2channel thread only started a week ago, and is only up to 81 posts, so the opinions expressed may evolve over time, as more and different kinds of people decide to post.