Well, Although I know it's not realistic... I'd request Gackt... xD
He is not only hot, has a beautiful voice, and famous in multiple countries, but was also the model for Cloud (Final Fantasy), Gakupo (Vocaloid), was brought into Kamen Rider Decade, and even had his debut with S.K.I.N. (including Miyavi) at Anime Expo...
On a more realistic note, I'd like to bring Yuya back? Okay, I know people dont always like it when a person is repeated, but I and many others weren't able to get an autograoh from him because we missed the times for the autograph session... since there wasnt a schedule... It almost seemed unfair... Can we bring him back? (;´ρ`)
Manga Artists: Ayano Yamane, Minami Haruka, Yana Toboso
EDIT: I missed Yoshiki, too! Am I the only one here that missed a lot because of all the confusion with schedules and overlapping times?