The only way Iran will give up its nuclear ambitions is If there is no longer Islam....and even then there will always be rogue and terrorist nation leaders wanting nuclear as a deterence as we are still and likely will be remaining in a nuclear age.
You have no solution then
I offer the solution that denuclearized Ukraine and halted ROK. Japan, and Saudi ( we hope)
And the only pragmatic suggestion to halt nucs in Iran and if that works, perhaps NK
but they will be under Russia or China, not us