bkh welcome to the Newmar forum and irv2.
The TV control box you have in your upper cabinet up front with VCR in the newer coachs have inputs in mine for three TV's plus VCR. Most VCR are on there way out so that input maybe used for TV. I have never looked for larger control TV controls but I bet there are larger ones.
You would also have to check with Newmar and find out how they wire cable input to those to TV's and outside TV input they may all be on one feed back to control box as your present one is.
Newmar will wire somethings the way you want but you will have to check with them.
Most newer TV's have game inputs because thats what the kids want find out what model when talking with Newmar.
Enjoy the forums and do post often.