I am at my wits end with my Cooling system. Still having overheating

My Wrangler has now bee at dealership for overheating issues.

2) radiator caps

Oil Cooler

Radiator

2) Thermostats

2) Grills

I put a new grill without any mesh/protector and the needle will still got just under 3/4 and the fan will run very loud and 10-20 sec after the jeep is off.

I can hear the fan wile driving, windows up and radio at normal volume.

Checked the airfield and its clean. The tube was not full seated on the hose and maybe was leaking. All fixed and still running hot.

Not sure what to do and will call FCA again on Monday.