Torvalds, "Nakamoto", Stallman, Snowden ?

They are all great thought leaders, but not really on the industry/entrepreneurial side like Musk. None of them are multimillionaires like Musk, and if you look at the other multimillionaires in the industry, few of them are doing anything near as interesting with their wealth as Musk is.

Mark Shuttleworth deserves a mention here, for raising the bar on the user experience of desktop Linux.

Before Ubuntu, many user would have rejected Linux simply because it lacked system-wide good anti-aliased text (although a significant fraction of Linux users don't care about this issue).

Like Musk, Shuttleworth has a net worth of 100s of millions of dollars.

Torvalds & Nakamoto have produced much significant impact than Musk. I dunno how much money they have, and don't wanna, it's the private thing after all.