I was going through this process about a year ago. I ended up settling on the Protectli V1410 (Intel N5105 and 4 Intel I226-V 2.5Gbps ports) because: a) I wanted coreboot, b) I was a little wary of lesser-known Ali Express sellers c) Protectli seemed like a decent company and I felt good about supporting people investing in an open source firmware (minus proprietary blobs which you can’t do much about). None of that was strictly necessary, and you probably would be fine just going with a cheaper NUC or mini PC. I would definitely second some of the other comments on avoiding Realtek NICs though.

Just in case anyone else is running into this issue, after many months (and updates to Heroic, the Paradox Launcher, and Linux Mint) I was still having issues with this (though no specific libGLU errors) when I stumbled on another post that mentioned multisampling. My laptop has both an integrated and dedicated GPU and I guess this sometimes causes issues? The solution seems to have been going into settings.txt in the .var/com.heroicgameslauncher.hgl/.local/share/Paradox Interactive/Europa Universalis IV GOG/ and swapping multi_sampling from 4 to 0. Definitely don’t understand why this works (though will try to dive more into it), but figured I’d follow up with what ended up working for me!