lol @GrumpyMom that one is hilarious! sorry to hear about your troubles with FedEx. Nothing is more frustrating than waiting for a new toy and changing plans to be home to sign for it only for them to say, eh maybe not today.
As for clear cases, I'm using the ESR case for now. It's TPU so it's a fingerprint / oil magnet (as are all clear cases) but it's going on 2 months and no yellowing yet.
https://www.amazon.com/gp/product/B07H848Y5P/ref=oh_aui_search_asin_title?ie=UTF8&psc=1
Also using the ESR clear case and it is fantastic. It's the slimmest clear case I've found. Very grippy (subjective, I know), doesn't stick to the back of the phone due to micro dots (no blotches or pressure marks), covers all buttons, and a barely visible logo on the bottom right.