Surprised no one has legitimately mentioned Clannad yet. I mean, there are some hot chicks in there.
While characters may be accused of retardation or moeblobation, Kyou(and by extention Ryou who is her twin), Tomoyo, and Kotomi are all really hot. Nagisa has been gaining popularity lately as an attractive character. Misae is also really hot but doesn't get a lot of attention. Yukine is decently hot, but people don't generally think that way about her. Sanae is a hot milf. Mei is super cute. And even though everyone hates her(me included), Fuko is not exactly ugly. She does walk around barefoot in pantyhose all the time, afterall.