I haven't found a perfect case yet. I have two Sahara cases that come close. The vegan leather case feels really nice, but it's insanely tight, like I think I heard squeaking when I was trying to get it off of my phone. I also don't super love the plastic rim around the plateau, but I'd probably ignore that if it went on and off easier.
Protect your Apple iPhone Air with slim Indy Series vegan leather case featuring MagSafe compatibility, raised edge protection, and a secure anti-slip grip.
saharacase.com
I'm using their Slim Case as my daily currently, but it came with a few small pieces of something embedded into the back panel. The sides feel good, but the back is a little slippery. It's still the thinnest case I've found (that I feel like has some protection) that doesn't have a flimsy piece near the camera control cutout. My MagSafe charger connects to this, but I don't know how it would be with something like a wallet etc.
Protect your iPhone Air with the SaharaCase Venture Series slim case. Matte finish, secure grip, and reinforced corners deliver durable style and drop defense.
saharacase.com