I humbly submit that you have overburdened yourself by fixating on Power Consumption resulting in analysis paralysis. If you'll be watching only a couple hours a day does it REALLY matter that much if the TV draws 260-Watts or 460-Watts? If you want a big TV it is going to draw big power.
If all you want is a 1080P TV you can still buy them but they will have smaller lower quality screens at bargain basement prices with picture quality to match. Why? Because the world has moved up to 4K UHD and even 8K UHD. Even if you own no 4K content the upscaling to 4K UHD is pretty amazing so I wouldn't wish for the good ole days of only 1080P TV.
As for screen size, I sit 12 feet away and I am SO glad that I listened to my wife who suggested we consider going up one size. I thought the sweet spot would be 65" and I even taped a piece of cardboard to the wall to represent a 65" TV. It looked a little small as my wife had suggested. We bought a Samsung 75" QLED TV and sitting 12 feet away is just about perfect. We also mounted it slightly above center of eye level. This gave me a little more room under the TV for audio gear. And since I slouch back in the sofa I'm looking slightly up so that worked out well too. There are online guides for ideal TV mounting height and viewing distance. I looked at those guides and decided to mount ours just a bit higher and I'm glad I did.
We also have a new Samsung 55" OLED TV above the fireplace. Samsung OLED technology is brighter than others and the picture quality is amazing. We needed a brighter TV in the family room due to many windows and bright ambient light during the day. The 55" TV height over the fireplace is not ideal but not too bad considering.... Remember, I lean back a bit (slouch) with my head resting against the couch cushion looking slightly upward.
Oh, and it's not just Sony. It's really hard to find the power consumption specs for most TV's. I just looked for the power specs for our Samsung TVs. Can't find them on the manufacturers website or owner's manuals.
Samsung 75-inch Q90T QLED TV installed 2021 in the basement setup
I sit smack in the center of the sofa while listening to music. Wife's spot is her favorite chair off to the side for movie night.
My own albums and Qobuz + Tidal albums up on the big screen.
Album navigation and playback control via iPad
Did you notice there's no DVD or Blu-ray player? We stream movies in HD or even 4K from services including AppleTV+,
Amazon Prime Video, Netflix, etc. Got rid of the "players" years ago. Sold off all the CD's too.
In the setup up above I have a choice of using the fully separate Sonos ARC soundbar and rear channel surround speakers -OR-
the two channel only audio setup you see in the rack. The amp is Class D which is highly efficient, draws very little power at idle,
and runs cool. Class D has come a long way in recent years and it sounds excellent.
