Why is my car overheating?

What is your question?

Coolant level is good. Has new thermostat. Not leaking anywhere. Water pump is working fine. Radiator not broken. Fans look ok. Driving around and the car randomly overheats. Last night I got home it was on the border line of overheating but I left it on in neutral checked under hood for a min and the gauge went back down to normal. Im lost and confused.