Thermostats - Many times throughout this list
Radiator - old one literally fell apart
Lower, upper and heater hoses
Water pump again
Clutch Fan again
Lower hose again
Ive also burped the system using a couple of different but recommended ways. Ex, Down hill fill, uphill fill, taking out temp sensor, etc...
I shouldn't say it'll never get fixed, that was totally nonconstructive. Sorry bout that.
It just seems the minute I fix one, another thing fails. And it will still overheat in traffic with AC on no matter what I do...