So I tried 4 options. This was the other one I did not mention. It worked, but I didn’t like the extra size cut out for the camera. However, it did basically fit and looked good.
All things said, the best one I tried and the one I am using is this one " ZOEGAA Paper Screen Protector for Samsung Galaxy Tab S8 Plus". It is very nice quality and is very close to the right size. You have to be careful putting it one, as not to obscure the cameras (it’s a tight fit) but it works.
This is with the protector on:
This is without, just the bare screen:
It’s hard to tell in the image, but look at the top left around the border, you can see my fingers and a reflection of me and the phone. It doesn’t come out well on the photo, but this is visible slightly across the whole screen and is distracting and looks like ghosting. The image with the protector is much softer and smoother and not with ugly reflections. Very happy with the purchase.
If you buy this, buy 3 of them though. It’s hard to put on and you might make 1 or 2 mistakes.