So His death - which was a ransom for many - bought those He would not ultimately save?
Your disagreement is with Paul, not me.
Rom 5:6 For when we were yet without strength, in due time Christ died for the ungodly.
Rom 5:7 For scarcely for a righteous man will one die: yet peradventure for a good man some would even dare to die.
Rom 5:8 But God commendeth his love toward us, in that, while we were yet sinners, Christ died for us.
Rom 5:9 Much more then, being now justified by his blood, we shall be saved from wrath through him.
Rom 5:10 For if, when we were enemies, we were reconciled to God by the death of his Son, much more, being reconciled, we shall be saved by his life.
You are dividing up the death and resurrection to the point that one (His death) almost becomes superfluous in salvation.
Nonsense. His death for all sin, for all men, for all time, is the only reason men are justified to receive His life. (Just showed you).