Samsung carries a lot of advertising crap, tracking, etc. Pretty much every phones is going to be worse than Pixel in that respect, since you get Google's tracking + whatever pile of crap the vendor added (which in the end they all seem to do).

So it's basically:

Pixel with GrapheneOS > iPhone >> Google Pixel with PixelOS

I wouldn't recommend anything else. Theoretically Fairphone + e/OS may have been an option, but the security is crap.

I guess there is Sony, you could even install Sailfish OS, no experience though.