I hope no one would risk the poor guy's life by wasting another 30 sec taxi
Are you serious, stop on the runway, then what, blow a slide and slide him down? Taxi to the gate, call for a doctor, ask CC to assist if doc onboard or AED onboard, that is the quickest option. If an FO can't do that they should not be in the seat.
clutch it tightly at 50ft is going to tax the most capable pilot.
He had a heart attack, he did not decide to kill himself and everyone onboard.