Can あなた guys recommend me good アニメ with a main character that has a female voice actress?

Ami Koshimizu voices Ryuko, the main character, from Kill la Kill

Chivalry of a Failed Knight.
Stella Vermilion(pictured) is voiced によって Shizuka Ishigami.

Akame from Akame ga Kill! is voiced によって Amamiya Sora.

Mahou Tsukai Pretty Cure!

Mirai Asahina is voiced によって Rie Takahashi.

Romeo x Juliet comes to mind, and I really enjoyed it. Brina Palencia (the voice of Haruhi from Ouran and Ciel from Black Butler) does a spectacular job as Juliet.
Also, Gatchaman Crowds, Maria Holic, and Coppelion are all highly recommended ^^

The Devil May Cry アニメ is awesome with the sort of main characters Penny, Lady, and Trish, even though I hate Penny Because she's annoying.

Ryoma Echizen from Prince of Tennis.
He was voiced によって Junko Minagawa :)

One piece. The main character is Luffy(boy) but his voice actor is a woman.