I just came across Punkcases this morning. They have a few different versions of cases. One of them has a built in screen protector, and is certified water, snow and dustproof, and also military grade. I just purchased mine this morning a few minutes ago. I thought I would share here, since you're also in need of a case with the built in screen protector.
The reviews on their website, for this specific case, seems to be very good. I have yet to try one out myself though. But as soon as I receive mine I will let you know how it is. I chose expedited shipping when I ordered this morning. By the way, I already broke my S8 while in an OtterBox Defender case, and had to get a replacement from insurance(arriving today). But to me, OtterBox cases are complete BS, and the case broke in one day. Not to mention, after the S8 and the OtterBox case both broke. My dog got a hold of the OtterBox case and was able to rip off the side bumpers, and rip the case in half, in literally seconds. That's how bad, and crappy Otterbox cases are, that they're able to rip in seconds! It's supposed to be very durable and resist a lot! I honestly thought it would be tough as nails, and resist a dog messing and biting with it for awhile before it got damaged! Not seconds!
But I leave you with a link here on the bottom, directly to the case I purchased. which has a built in screen protector.
https://www.punkcase.com/products/g...irtproof-snowproof-case-1?variant=33285829377