One of the three he certainly wasn't important as a source of money (X/PayPal), as that is where he got the seed money for the other ventures you are diminishing his involvement in.
For Tesla he was an original source of money but has also been the CEO since 2008 (the same year they began production of the original roadster). So all the things people know Tesla for today (and have made it a hugely valuable company) happened under his direct leadership as CEO.
For SpaceX the idea that he is just a source of money is clearly ludicrous, given that it is entirely his brainchild. Since founding the company, he has done an excellent job of hiring all the right people that have made the company what it is today, and is clearly leading the vision and focus of the company.
Being a source of money alone was not enough to establish a successful private space launch company. There were plenty with even more money available and even actual institutional support that never got anywhere.
What the creator of DOGE said is completely irrelevant to this discussion. If you think there's nothing morally wrong about abusing your position to swindle your fans in technically-legal ways, then any further discussion is pointless.
For what it's worth, I have the same level of disdain towards all celebrities/public figures who abuse their power in this way. It's alarmingly common these days.
It was a judgement of personality traits/disorder. Not of commerical success.
SBF, Musk or Trump behave like privileged children that believe rules/law do not apply to them. They want everyone to know and admire them for their awesomeness, in fact it's their awesomeness that buys them an infinite number of get-out-of-jail cards.
Yes, Musk is the most useful out of all of them, by a mile. Still, the personality type/disorder is the same.