I‘m using Surface 3 (non-pro) as display and endpoint (not as the controller) and iPad as remote.
https://community.roonlabs.com/t/showing-off-your-roon-setup-description-and-photos/235/6799
The photo is old anyway, now I added Surface Dock for USD29.
your can pair with a physical media controller (I have an Astell&Kern RM-01) via Bluetooth to control volume, play/stop, prev/next track)
Samsung Galaxy View Tablet 2 have 17.3 inch size, but the price is high at USD 500, not a cheap solution.