I am not sure about who I would say has made the best rock music of all time. But if you have your opinion on the subject, PLEASE POST! I am going to have to say the best modern rock group going today is Audioslave. Chris Cornell (former Soundgarden front man) + members of Rage Against the Machine = Audioslave They have a new album coming out at the end of may. If you use I-tunes you should check out their music. Cornell has one of the best rock voices of all time, IMHO. What fills your quarry (rocks, lol)?