You are saying that the extra downforce on the tail is causing more total downward force on the craft. This increase of total force must be countered by the wing, therefore requiring more velocity into the relitive wind.

Or put more simply yet, the wing has to make up for the extra downforce created by the tail so it requires more lift genereated by the airfoil.

I agreee with that idea.

Point the aircraft straight up and it is all out the window. Your data is only applicable to flight at a constant angle of climb or decent.

So lets go back to your original question:

"Will an aircraft stall and a higher or slower airspeed with a forward CG vs. and aft CG? "

The answer is "it depends" it is either yes or no, or neither yes or no.

This entire topic is the foundation of canard theory. A canard adds no downfoce so it requires no additional lift to counter the downforce, thereby reducing total drag (in theory).