I have good expirience with Vivaldi. Yes, Chromium based, but very-very customizable, a bit slower than other browser, again because of customizations, but in general it looks like they believe that user know what he/she is doing.

Kagi has their own browser called Orion, their whole business model (including search) is that you pay for it instead of you being sold.

Unfortunately, it's iOS only and based on WebKit.

There's definitely an opportunity here, maybe using Servo as the browser engine.

LibreWolf, Mullvad Browser, Brave, Chromium

WaterFox