Stuck Pedals

Right hand drive side, Look Keo pedal, stuck.
Tried:

1. One person sat on bike while other pulls wrench upward on inside.
   
2. Bike upside down hold cranks at 3 and 9 o'clock and push down
   
3. Push pedal with wrench attached down into raised bricks to push wrench upward
   
4. Lubricant sprays
   
5. Heating crank arm
   
6. Extending the wrench lever length
   All resulted in no movement.
   
   

Running out of ideas. Anyone got any more?
Thinking about trying to over-tighten the pedal further to see if it pops it too far and slightly looser.