I think there are a few GNU extremist distros that don’t package drivers with blobs. They don’t even boot on some CPUs if your motherboard hasn’t had the necessary microcode patches, lots of hardware simply doesn’t work (WiFi, Bluetooth, sound, sometimes even ethernet), but they’re fully open.

I have no idea how Linux-Libre is doing. I think Guix also had a Linux distro that refuses blobs by default. Most reviews end with “the WiFi doesn’t work but it was nice experiment”, it seems.