In your "as Christians tell the story", you're missing quite a bit.

Christ's level of suffering in the garden of Gethsemane and on the cross was such that he atoned for all of the sins of everyone who ever lived and ever would live. Atoned, as in "to atone is to suffer the penalty for sins, thereby removing the effects of sin from the repentant sinner and allowing him or her to be reconciled to God".

It's the method by which God is able to temper justice with mercy, through the mechanism of having someone else voluntarily pay a legitimate debt on our behalf.

This level of suffering by definition exceeds any suffering that ever has or ever will be suffered by anyone else, since it essentially includes it all.

Christ suffered willingly and voluntarily, knowing ahead of time what he was getting himself into, in order to save everyone else from being forced to suffer for their own sins. That payment in our place is what provides the opportunity for us to be saved from our spiritual death.

Christ's death on the cross and subsequent resurrection in order to solve physical death is very important, but minor suffering by comparison.

Christ's two part atonement is so beyond the sacrifice made by John Perry that you'd have to start referring to humanly incomprehensible numbers in order to fairly compare them.