You have to choose from one of two strategies, either you go with tor-browser (also includes Mulvad-browser) route and try make your browser indistinguishable from others or you randomize values to make stable fingerprinting impossible.

When trying to be similar to everyone else, even small changes to the browser, like changing window size, can make you easily identifiable from everyone else. Randomizing will allow you to modify your browser. None of the fingerprinting protections matter if you use your browser and session to login to some sites.

I use multiple browsers. One is for login to sites and tor-browser is for most of my browsing.

This is easily the best fingerprinting extension that I have found so far: https://jshelter.org/

I think you're right with having a two-browser setup and I actually want to give it a spin. I envision I'll need to change some habits but it really does seem like the cleanest way to go about it.