Diatonic has been recommended a lot on this sub.

http://www.amazon.com/gp/aw/d/B00YBYNQZM/

Caseology this is one of my go to brands. I own their thicker case

http://www.amazon.com/gp/aw/d/B00W652PW8/

PLESON® slim fit... I love their screen protector, but I actually own their tpu case for an older phone i have. It is decent just like the ones that are 2-5 dollars more expensive.

http://www.amazon.com/gp/aw/d/B012V5JX40

Forgot to add the cool looking one aka Cruzerlite

http://www.amazon.com/gp/aw/d/B00WLAYDXM/

Cases that actually protect.... Usually thicker.

Edit: added one more