I would argue that a death which involved no psychological or physical stress (ie. being quickly killed in your sleep or shot in the back of your head if you never saw it coming) would not be a harm, although it would still be unkind to kill someone without causing them stress since you would be depriving them of all the happiness they would have otherwise experienced. In my view, only stress is 'harmful', only happiness and the absence of stress are 'beneficial'. Being dead (unconscious) is neither good or bad, in my opinion, it's of neutral value. What do you think?