for chromium I am actually using the Linux Mint packages (which work absolutely fine), and I have just set up a small repository I can add to apt:
deb [arch=amd64 allow-insecure=yes] http://snapless.cmeerw.net victoria upstream
this just syncs from Linux Mint and only republishes chromium in the Packages file (with downloads redirected to a Linux Mint mirror). BTW, I am not signing these...
Ubuntu is going the way of snap-only and it might as well pick an Ubuntu-based GNOME distro. There's a bunch out there, but PopOS can be pretty easily stripped down to a vanilla GNOME system. You could even just modify Mint and install GNOME on top of that.
How about VanillaOS? That's an Ubuntu (soon to be debian) based plain GNOME system with support for a range of packaging formats.
You could also go for Manjaro GNOME edition, but not as stable.
Zorin is cool but not as barebones for a GNOME spin.
Oh yeah, for sure. I was just throwing out some other ones to check out if they had a different preference on DE or just wanted to check out something different from GNOME. Just adding on to the options!