I guess it depends on what the meaning of "IS" is. If you mean a LIVING drug addict, I would be able to list several hundred entertainers, politicians, star athletes in all sports, etc, most of whom would be better-known than Rush.
But then, Rush is (if you believe him, which I do) a former addict, so he would not be covered by your question, either...
I think the 12-steppers don't believe in "former" addicts. I don't neccessarily agree, but I have no firsthand knowledge one way or the other.