Do you guys know any Anime and/or Comics where David Bowie or one of his characters has been portrayed?

The Venture Brothers.
https://www.youtube.com/watch?v=j1X3vl8QMYk

I would never expect that is so small amount of bowie material out there in comics..

other than some manga I can think of maybe try the Labyrinth art books/ coffee table books. there are some good ones just like with Dark Crystal. also I don't know if its out yet but the comic series about the Goblin Kings origins seems interesting

does Yoshikage Kira count?

Kira is the only Bowie cameo that counts.

Not an anime or comic, but perhaps Emperor Light from FF2 would count.