I have a 2018 6.7 diesel. I know that diesel engines have a heavier load placed on batteries than gasoline but, when it came time to replace mine, I went with a Mopar battery. Believing that it was at least engineered for my particular vehicle.
I applaud you for taking your time to make an informed decision. When you are in a place that has no near services, or are somewhere where there is no qualified assistance, the battery you have is very important.
Mine were only marginally more expensive that other off-brand batteries when I watched for specials at my local Ram dealership. I have vehicles that have lasted 284K miles and always looked to OEM parts when available. (Other than air fresheners or cup holders!).
Good luck on your search.