

It’s not released yet, but I’ve been keeping my eye on the Open Printer project by Open Tools. You can sign up to get email updates on their Crowd Supply page.
Edit: Sorry, just seeing the no Wifi/Bluetooth, so this might not be the best fit (but it does aim to be fully open source, so maybe in the spirit of what you’re looking for?)

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.