I did leave one browser off from my list to try and that would be Epiphany aka Gnome Web, the problem with it though for Mac is it's severely outdated in MacPorts from what I can see and getting it to run on Windows requires enabling WSL and installing it via Flatpak.
So really other than that and or customizing FireFox/LibreWolf to make it look like Safari with this https://github.com/vinceliuice/WhiteSur-gtk-theme/tree/master/src/other/firefox you're stuck and I can understand your frustration.
For bookmarks you could use Floccus or XBrowserSync. You can also consider Dashy if you want a dashboard/startpage if you have a spare server laying around or want to use Heroku for your bookmarks + apps.
That's my 2 #sats anyway, hope that helps.