In my opinion EndeavourOS is the best "Arch for the rest of us" type of distro. Manjaro has proven countless times that their main team is incompetent at best.
Agreed! I migrated from Manjaro to EOS after Manjaro broke packages and installations for the second time in a couple years, and my experience has been rock solid with EOS.
I've never had any problems with Manjaro, and it seems actually quite good to me, too. But the key difference is that it uses its own, different, package repositories.
EndeavorOS is similarly "arch linux plus and installer and large set of GUI packages" but after it's installed, you use the exact same main Arch repositories to update your system, as if you had installed Arch yourself, and then installed all the same packages that EndeavorOS chooses.
This is what makes EndeavorOS "the most Arch" arch-like distro. The experience with Manjaro is pretty similar to Arch, but not as similar.