There’s the newish WiiM Sound, which is Roon Ready. I’ve had WiiM Pro for 2+ years without problem, and the app is very decent.
Sonos is the obvious candidate for multi-room, and I have devices scattered through the house including Era100s. Last year’s Sonos app revamp has of course left a lot of people grumbling. These days I mostly treat Sonos as Roon endpoints for my/Qobuz music. I made a few comments about the Roon-Sonos interaction is this thread.