I believe that in the film version actor Brandon Lee plays Eric the rocker due to the heavy song influence O'barr uses in the book. O'barr admits that the majority of his influence for The Crow came from punk legends, Joy Division, The Cure and Robyn Hitchcock. He also modeled Eric Draven from punk "godfather" Iggy Pop. After reading The Crow for the first time I found that O'barr leaves you with a playlist of songs that fit the reading perfectly with the emotions and actions protraid by Eric.
In this video you can clearly see Iggy Pop in Eric. Everything from how he moves and carries his body is reflected the O'barrs character.