Look into "NEC Commercial Displays". They're intended for use as signage and things, but most of them are full TVs with ATSC tuners, remote controls, speakers, and everything. They generally do not have any smart functionality, but often have serial ports or interfaces for adding your own. They are often slightly more expensive than the more encumbered displays, but not by much.

The biggest problem that I've found with them is that they're not available at your local store, so you pretty much have to just buy one sight-unseen and hope it looks good when it arrives.

I got the NEC E554 from Amazon, and left a 3-star review for it there.