Greybird VS Matcha-gtk-theme

On his 3rd point of theming; Xfce should adopt Greybird Dark, which has Flatpak support. It looks nice enough. Also wouldn't hurt to drop the out-of-box, two panel "Mac" look.

Theme: Greybird (Xubuntu's default) (I've made titlebars thin with a GTK css tweak.)

I'm new to pop_os, I came over from Linux Mint. I'm quite fond of the Mint-Y theme so I went to the Mint repository and downloaded the theme package but when I move the file into my .themes folder I only get the one default Mint-Y light theme (green). I'm hoping to be able to switch to Mint-Y Dark Blue, but can't figure out how to get tweaks to recognize the different variations. I tried pulling the specific Dark Blue folder out and moving it to .themes but tweaks didn't see it either. I'd like to try the new Greybird Dark theme as well but running into the same issue as it comes packaged with Greybird Light in the same download. Any suggestions on how to make this work?

I use one of the Matcha themes with a few modifications and the Qogir icons.

Your other option is to find a theme that has a slimmer look, that way you don't have to change the font size or anything else and let the theme take care of the padding. This theme comes to mind, although I haven't personally used it in a while. There's also Linux Mint's official theme Mint-Y, it might be in Pop!_OS's repositories (sudo apt install mint-themes) but there was a recent update that made the themes look much better, I'm unsure if this new update is already in the repos.

Matcha as well.

I use Matcha on just about every system. https://github.com/vinceliuice/Matcha-gtk-theme