Yeah, ok, I get that the article did say there is "only one" Elon Musk, but pointing out the small handful of individuals in a similar space doesn't seem like a very solid refutation of the points made.
And with the possible exception of Branson, none of them are close to doing as big of things, with as much success, and as much inspirational flair and passion, as Musk.
The author is the one who narrowed the field, and unnecessarily so, to make a point.
He starts the criteria with "billionaires".. 0.000000215% of the worlds population.
Then to narrow it down farther he says they must be working on 'cool sci-fi shit'. Ie: they can't just be doing innovative things, they must be sci-fi things, and even if they are sci-fi, they must be 'cool'.
Of course there are only a few people who meet that criteria.
Its not very sci-fi but I find what Bill Gates, Warren Buffet are doing with the Giving Pledge to be every bit as important and inspirational as what Musk is doing with Tesla and Space X.
There's a lot of ways to contribute to society, to each their own.
