The Clark Bros have four entries out of five in the Best Recording Packaging category. Thems are some good chances.

Anberlin - Cities
Project 86 - Rival Factions
The Fold - Secrets Keep You Sick
The Chariot - Fiancée

The sole non-IC entry, for The David Crowder Band’s Remedy, wasn’t listed with a designer, but in doing some digging I found out it was designed by one Kaysie Dorsey.