Apple made him the youngest tech multi-millionaire. Pixar a billionaire. Apple, again, where he built the world's most valuable company and insane profits.
More n than most billionaires, no? Only Buffet has a real n>5.
Key is he was not a one-trick pony. Real data to prove it.
Right now I'd put Bezos in that category with an n=2 (ecommerce, AWS).
To show a counterexample, Brin/Page have an n=1 - ads. Rest is cool tech, but not significant business and yes, I am adding Youtube into the ads business idea.
Same with Zuckerberg, both Instagram and WhatsApp were about adding eyeballs to the same business model - super ideas, but additive. If Facebook Workplace takes off as a paid-for business, he will have n=2.
Does PayPal count? How much relied on the others? I don't know.
Tesla, Solarcity and SpaceX are all on the verge, but not quite there yet.
5 years from now he either has a n=3+ or is known as a massive flameout. but yeah, good shot at being a SJ 2.0.