Since the iPhone 5c, I've settled on one brand of case: Ballistic.
Sure, I tried Otterbox and it saved me headaches, but as the size of phones has increased, Ballistic's hard and soft surfaces seem to fit my pocket better and their crash testing seems correct.
How much is a case worth on a US$749 phone? You only have to look at a few drops and the repairs to see that US$34.99 isn't much to prevent repairs over the life of a phone.
This time, I bought two Tough Jacket cases, one white and black, and the other black. At the time, they were on discount at US$19.99 each. Now, they're US$34.99 each. Signing up for their newsletter will notify you of discounts.
Apparently, you can use these for the iPhone 6 and iPhone 6s, as well, but you can't use the earlier phone cases, as it partly covers the camera lens.
I don't get anything for doing this but here is the link: https://www.goballisticcase.com/