In summary:
Chrome and Safari can’t be trusted because the profit model of the parent company is at odds with building a user first browser.
Firefox cannot be trusted because they work on too many unrelated projects.
Open source alternatives cannot be trusted because they don’t try to profit off of users.
Brave is good though, despite having a profit model directly at odds with a privacy first browser and working on many unrelated projects (multiple browser versions, a search engine, and a VPN, a cryptocurrency) even though they are smaller than Mozilla.
The fact that you can pay for a version that doesn’t sell your habits to advertisers goes against the point you are trying to make. Other than Google, every other browser does that by default for free, and even Google offers chromium for free.