I would say either Firefox (with some extensions) or Brave.
Firefox is the one I can recommend based on personal experiences. My whole family uses it either as primary browser on Windows or secondary browser on Mac. It's a reliable browser and given that most other services like password managers offer extensions for Firefox it is highly flexible. Little downside, for privacy you have to install some extensions manually. I use and highly recommend uBlock Origin, HTTPS everywhere and CanvasBlocker.
Brave is a very interesting product. It's easier in the sense that those privacy protections are built-in. Some password managers are already built-in as well, but as of today it does not support extensions in general (which can be a downside). As far as I know it's planned for the v1 release. Brave's business model is definitely interesting (see FAQ for further infos https://brave.com/FAQ.html), but I haven't invested enough time into this yet to come to a final conclusion.
The FAQ also answer @laura's question about tracking. In general, ads are targeted but the targeting and analysis of user behavior happens only on the device itself. They also plan to whitelist ads that meet some "quality standards" ("non-intrusive, not tracking, ...") and say that won't charge fees for getting on that list.