Jeep is running hot, what are the possible issues?

My jeep started running hot about 3 days ago. Buddy of mine and me tried replacing the thermostat and housing for it. No luck it seems.

Going to buy a sensor tomorrow replace that as well just to be sure. There is no leaks from what I can tell, imagine it would be fairly obvious. Next option would be water pump.

If all this fails…What else could it possibly be? I am not that mechanically inclined, any ideas would be great before I have to consider a shop. I’m thinking about trying to get a diagnostic run on it.