As @Ilya mentioned you need the lift for if not fo the ground clearance - at least to accommodate larger tyres. I drove once without the lift but with larger 285 tyres. I faced few rubbing issues. @Kailas has been driving without a lift and 285s for months. He is an expert so he manages the rubbing issues a lot better than I could ever do, but they persist.
Anything over those puny 245s will help. A 1.5" spacer lift kit for 285 or 2.5" for 305s will help a lot on the clearance without putting a lot of money into it. 305s perhaps are the sweet spot - to think of it with any lift other than the 1.5" spacer lifts.
With my research, I definitely wasn't going anywhere, and my biggest fear is the "buyer's remorse" - and that meant sticking with agency stuff. Obviously there were stuff I got or tried to get done outside the agency but stuck with Mopar the lift kit at the end. And it was an easy way out for most of the way, there wasn't too many things to go wrong, except for the bank balance.
with 2D JLs these tyres don't add any more weight than the engine can not accommodate with ease and the wider tyres more than compensate for their weight with more traction anyways.