Home theater couch?

Leather?

Couches are not something that you can buy just by recommendation.  You will have to sit on a lot of couches to find something that works with your body.  It might be that a couch will always have problems with your back.  They aren't usually built for back problems or support.

I love my stressless, very comfortable...

https://copenhagen-imports.com/wp-content/uploads/2019/12/Stressless_Emily_modern-sofa-04.jpg

+1 auxinput is exactly right...

http://www.fortresseating.com/sofas-sectionals

https://www.natuzzi.com/

https://www.flexsteel.com/modular

Not sure where you live, but if you can’t find something at Nebraska Furniture Mart (Omaha NE, Kansas City KS, Dallas TX), then I’m not sure it exists?

Thanks for the replies.  Stressless is looking like something of interest I’ll need to see if the have less modern designs to fit my space. I’ve had a Natuzzi sectional for ten years. From day one the cushion support has been terrible and I even had them come to adjust. Also it claims its Italian but my couch was made in South America (if folks care about country of origin, which I do). I’m in Pittsburgh which is a small/ medium market so not quite as many options as other locales.