OK, time for desperate measures.
Leave the remover in place, tightened as far as your comfortable with. With both brake locked so the bike can't move, stand on the pedal and do lunges. Often this is just that extra bit of force needed to pop it off.
Or, replace the crank bolt, backed off about one turn from tight, and ride around locally looking for steep hills, or do wind sprints. The goal is to stand on the pedals as much as possible until you hear or feel the click of the crank popping loose.
Lastly, you can buy a pair of Jacobs chuck removal wedges and use them behind the arm to push it off.
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FB
Chain-L site
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