Why not the official one? I’ve had mine on my 6 Plus for three years and it’s still in pretty good nic compared to other cases I’ve seen.
For most people these days I reckon you should go to the cheap shop in your local mall, spend $20 then throw it out in 12 months and buy another one when it gets ratter. Probably cheaper than a ‘decent’ case. My wife loves Otterboxes but I have to say the last one we got has fallen apart in under 12 months and she’s back to using a cheapie again until we can find something she likes again. It was a Symmetry that fell apart although just like the defender cases she has had before it’s the rubber bits that stretch pretty badly over time (I’d recommend factoring in a replacement every 12 months).