Positive or negative is not the subject of this discussion. The point is the mere presence of influence. And it's as strong as ever.
Frankly I would have considered Marlon Brando as well.
One is talking about the lasting social influence, and then of its degree. Since music affects in a socially noticeable way only those involved in its production [in their bank accounts] and the groupies of the deadheads type, the social influence is neither lasting [the groupies eventually outgrow their infantile derangement] nor important.