OOHASHI Kaoru

I found one for myself:

1. KOBAYASHI Hiyoko

• And she made Peridot. (I loved that series.)

MORINAGA Milk

Found another one:

1. KATSURA Asuka

I believe 7 days has passed. Well, since no one has anything, I'll try to keep this thread alive weekly.

Here is another I found:

1. SEKIYA Asami
2. KOBAYASHI Takumi

1. AISAKI Keiko
2. AKINA Tsukako
3. AYANOKOUJI Ayano
4. CARNELIAN
5. Chiaki Ogishima
6. GA On-Bi
7. HARUMI Chihiro
8. INABA Minori
9. IWAMOTO Naoki
10. KAMIMURA Sumiko
11. KARBO
12. KIM Ji-Man
13. KOYOKA Yoshino

Wow, that is a huge list. I only have one author to add.
She's only done H-works though.

YUKI Yanagi

TSUBAKI Kawori

Another ecchi artist who just happened to be female.

How about GOKURAKUIN Sakurako of the Sekirei fame?

Edit: Though, according to MU, almost everything else she ever made was BL.

SAKURAI Shushushu for a oneshot Onward! Maiden Road

KAGESAKI Yuna - 6 hentai series, 1 ecchi

NINOMIYA Hikaru

A few more I found:

MAKITA Aoi

YUNAGI Kahoru

AYUKAWA Aoi

AZUMA Yuki

MAKITA Aoi

KOMIYA Sanae

MITSURUGI Aoi

NONOMURA Hideki

MUKAIBI Aoi

HASEGAWA Yukino

Found some ecchi artists but they did yaoi too... lol

1. SANRI Yoko

2. OSAWA Amane

3. udk

4. Syumatsusyorijou

5. Uchouten

This thread is still going strong

Cannabis
NAONO Bohra
Makuro
Shimaji
YONEKURA Kengo
KONATA Hyuura
MIKAMI Hokuto

Found another female hentai artist.
It seems she started as a shoujo style artist.

ANZU (one hentai doujin)