https://digdeeper.club/articles/browsers.xhtml has a somewhat comprehensive analysis of a dozen of the browsers you might consider, illuminating depressing (and sometimes surprising) privacy problems with literally all of them.

In the end it absurdly recommends something which forked from Firefox a very long time ago, which is obviously not a reasonable choice from a security standpoint. I don't have a good recommendation, but I definitely don't agree with that article's conclusion: privacy features are pointless if your browser is trivially vulnerable to exploits for a plethora of old bugs, which will inevitably be the case for a volunteer-run project that diverged from Firefox a long time ago and thus cannot benefit from Mozilla's security fixes in each new release.

However, despite its ridiculous conclusion, that page's analysis could still be helpful when you're deciding which of the terrible options to pick.