Tahoe, Sequoia, F150,....any of these V8s with a tow package should have no problem towing any Jayco hybrid out there. I have a hemi in my Commander (same power train as a grand cherokee) and it easily tows the 17Z. In my experience, where the V8+tow package shines is when you towing fully loaded at 65 mph in +90F temps with the A/C blasting and a 30 mph cross wind.
2010 Jayco 17Z
2007 Jeep Commander Overland 4x4 HEMI