Okay, here’s a weird one, but I don’t think it’s been suggested to you yet. How about trying an orthopedic body pillow? They’re more commonly called “pregnancy pillows,” but anyone can use them, obviously. Here’s one that’s kind of the quintessential model. This one looks like it could work for a taller person (but I’d look around to see what you can find).
The gist is that your body stays in general alignment all night, and it takes some pressure off of specific joints. Particularly good for people who move around in their sleep and wake up tangled in blankets or aching from the weird way their arm ended up under their neck or whatever. Also it just kind of makes you feel like you’re being spooned/cuddled. Only downside is that it’s harder to cuddle your other half without vaulting over the side of the pillow.
Good luck!