Fullmetal Alchemist*, Digimon Tamers, Cowboy Bebop*, Baccano!*, Durarara, Eureka Seven, Blood Plus, Gurren Lagann, Lyrical Nanoha, Bokurano, Vision of Escaflowne, Medabots, Trigun, Souleater, D.Gray-Man, Haruhi Suzumia, Azumanga Daiouh, Welcome to the NHK!
If you want be a little artsy about it:
Rahxephon, Mushi-shi*, Wolf's Rain*, Garden of Sinners, Serial Experiments Lain, Revolutionary Girl Utena, Princess Tutu, Haibanae-Renmei, Kino's Journey, Maho Shoujo Madoka Magica, Paranoia Agent*, Haibane Renmei, Monster*.
*Just as good if not better in English than the original Japanese track.