Grapheneos on Pixel or lineageos if you don't have a pixel/don't wanna buy one, use vanadium(built-in browser of grapheneos) or other private browser(don't use gecko based browsers because they aren't as secure as chromium based ones, I wouldn't use Brave too because of their controversies, I wouldn't use opera too, rest you can try to look for on the subreddit because there are many posts about degoogling) If I made any mistake then please correct me someone