Pricy but best if you have a smart-keyboard
I bought one of these after an expensive iPad drop to protect the corners of my iPad Pro alongside my smart keyboard folio. Although it leaves the keyboard-facing side unprotected, it protects the rest of the edges and corners which is what I was looking for. It’s the most minimal product I found that does this.
Four stars because it’s way overpriced for what it does, but I didn’t see anything else as minimal with these features. I also didn’t need the compatibility with the rest of Pitaka’s products, but the embedded magnet allows me to continue to mount my iPad Pro on the fridge (be careful with door slams!).