Maybe too late to be helpful, but I put a dbrand on mine. “Swarm” pattern. It has small ridges in a hexagonal pattern that help with traction.
My iPad is in and out of my bag all day, so I also got a pencil holder that sticks on the back. Bonus is it adds additional grip too. This one.
I sometimes wish I’d gotten one of the leather dbrand skins, and may try that later. I just think it would look nicer, and better match some of my other things.
But it’s a snook package and makes the iPad easier to hold.