Grey Ghost in Batman: The Animated Series.

Simon Trent was a popular actor about twenty years ago, during Bruce Wayne's childhood. He portrayed the Televison hero, Gray Ghost. His show was very popular for a few years, but it was soon cancelled. For years, Simon Trent tried to get work in Hollywood, but was typecast as the Gray Ghost. He was forced to sell his memorabilia in order to just pay for his rent. Then, when a bomber began to mimic crimes from the old Gray Ghost Show, he was able to help Batman solve the crime and he was again in the public eye. While he doesn't fight crime in real life, he is enjoying revisiting the character he made a classic all those years ago. He is voiced by Adam West.