[MrBingley]

The Turris Omnia and soon-to-be Turris Mox are the only ones that I'm aware of. I know Linksys has a special line of WRT "open source ready" routers that are supposedly OpenWRT compatible, but the Amazon reviews are completely trash. They're a little more pricey, but my next router will be a Turris.

https://www.turris.cz/en/turris-omnia/

[tasubotadas]

Now that I think about it, probably the new Raspberry Pi would do a phenomenal job.