b-but Athena Glory was short hair and oppai.

sure, short hair was most of the time associated with tomboy character, and for some reason, most tomboy character is DFC to begin with. (there's a few exception, obviously). but no, there's no such thing as short hair and oppai doesnt work together.

....okay la, i list a few.
Yoshii Akira (bakatest)
Airi Kashii (ro-kyu-bu)
Chie Arai (szs)
Effie (lotte no omocha)
Lynette Bishop (strike witches)
Watase Meguru (hatsukoi limited)
Miharu Takeshita (b gata h kei)
Konno Mitsune (love hina)
Musubi (sekirei)
Fujieda Nanae (sky girl)
Yorihime Nao (yosuga no sora)
Rio (rio rainbow gate)

well, yeah, it depend on one's personal taste and opinion in first place.