On most short-haul & regional aircraft, you would be very, very lucky to get the incapacitated pilot out of their seat. Especially if they have developed their command belly to full potential.
I would expect that the drill in most airlines is for the CC to secure the affected pilot in their seat by locking the harness and pulling the seat as far from the controls as possible.
If the commander is incapicitated, nobody will know until the aircraft arrives on stand, and the FO has rung all the other pilots to see how much they are prepared to bid for the vacancy on the seniority list - the higher the bid, the smaller the chances of resucitation. If the FO pegs out, nobody notices until it is time to make the tea.
