It's weird to credit him with Paypal and Tesla (that formed without his involvement, and in the case of Paypal he founded a *competitor* that lagged Paypal before being folded into Paypal) and also OpenAI, where he was indeed a part of founding it but walked away from it well before anything vaguely interesting happened with it.
Either the *actual* founding counts to give him credit for OpenAI and the actual founders of Paypal and Tesla get credit, or being there when it makes it big counts, and OpenAI does not count.
At least for Zip2 and Paypal, it's painfully obvious that he had luck/confidence rather than competence to explain his situations there. Zip2 money had nothing to do with product and just a lot of money for the vague concept that Compaq did nothing with, and Paypal's trajectory was positive before Elon, Elon about tanked it, and him getting ousted was how it flourished again. He had 11% of the shares because he made some idiots think he should have that much, not because he's actually valuable for the business.
Tesla roadster was implemented verbatim from pre-Elon design, but hard to say for certain about the more enduring success of Model 3/Y. However I've heard claims that Cybertruck was really the first pass at just letting Elon get what he wanted, and that is... well... something...