Any billionaire who thinks of themselves as indispensable to society and has a highly visible public presence. If Musk was behaving towards the CCP half as disrespectfully as he does towards the the US political caste, he'd have been stripped of his China holdings and locked out of that market long ago.
No, the equivalent in US wouldnt be a capitalist billionaire. It would be its opposite: a popular group with marxist or communist ideals that menaces the status quo and current order. Like the Black Panther Party. And, oh, they were disappeared, some of them still are in solitary confinenent because the government is afraid that they could spread their ideology to other inmates.
The only example you can find is from 40-50 years ago? Around the time that China (while we're at comparing with China) was having its military shoot protesters in Tiananmen square?
Just because the government here was so successful that there isn't any remotely threatening fundamental opposition doesn't mean they wouldn't do it again. Those people are still unjustly in prison and still haven't been released.