I would clear the code and then I would disconnect the negative battery terminal for 5-10 minutes to reset the ECU. Try connecting the negative battery terminal and see if that fixes the problem.
If that doesn't work, considering the circumstances and the fact that you have tried several different throttle bodies, I would suggest that it is likely a problem with the wiring harness. I would check the throttle body connector to make sure the pins are straight and that they are fully locked/seated and don't move back, and I would check for continuity. The throttle body harness clip is a common point of failure.
The fact that the car cranks, but doesn't start after said install sounds like the classic issue of not having the injection driver (EDU) bolted in position, which means it isn't grounded. This is the electronic control module that is on the left side of the engine attached to that blue bracket. When you said you changed ECUs, you were referring to the only ECU the car has, right? The one that is under the dash on the passenger side? You weren't referring to the EDU in the engine bay, right?
