@seldo with Andreessen, I think it was 1) he wrote Netscape! (which, well, no, he was one of the developers), and 2) he headed Netscape, and they were the underdog! (which, again, only part of the story).
Has he done any good for society since the late 1990s? Probably not.
(I do give Musk credit on playing a role in kicking the industry’s butt and showing an electric car can absolutely be done.)