I will let you confirm the details, but here is Anslem (c. 1033-1109) and Martin Luther (1483-1546).
"Anselm investigated the purpose of the incarnation and the death of Christ in his book Cur Deus Homo (“Why the God-Man”). The problem as stated by Boso, Anselm’s interlocutor, is that “sinful man owes God a debt for sin which he cannot repay, and at the same time that he cannot be saved without repaying it” (Anselm, “Why God Became Man,” in A Scholastic Miscellany: Anselm to Ockham, p. 146). Anselm argued that God’s honor must necessarily have sufficient satisfaction if he is to show both justice and mercy. The Son of God took full humanity and lived in perfect righteousness under the law of God to honor his Father’s holiness, and paid the debt of death he did not owe as a punishment for sins he did not commit. Anselm viewed it as “rational necessity,” that man’s redemption and restoration “can be accomplished only through the remission of sins, which a man can gain only through the Man who is himself God and who reconciles sinful men to God through his death.” Our just debt to God as creatures and our moral debt to God as sinners would be impossible to fulfill apart from the way established by infinite wisdom: “Thus it was necessary for God to take manhood into the unity of his person, so that he who in his own nature ought to pay and could not should be in a person who could [whose life] was so sublime, so precious, that it can suffice to pay what is owing for the sins of the whole world, and infinitely more” (176). When contemplating this with Boso, Anselm draws the discussion to a succinct conclusion: “To whom would it be more fitting for him to assign the fruit and recompense of his death than to those for whose salvation … he made himself man, and to whom … by dying he gave an example of dying for the sake of justice? For they will be his imitators in vain if they do not share in his merit.” (180)."
Luther certainly believed in the subjective effects of the atonement but based this solidly on a rich understanding of the objective Godward impact of the death of Christ. In a sermon on Easter Sunday, Luther pointed to Christ’s sacrifice in terms of ransom, satisfaction, propitiation, and implied substitution. His hearers needed to consider “the greatness and terror of the wrath of God against sin in that it could be appeased and a ransom effected in no other way than through the one sacrifice of the Son of God. Only his death and the shedding of his blood could make satisfaction. And we must consider also that we by our sinfulness had incurred that wrath of God and therefore were responsible for the offering of the Son of God upon the cross and the shedding of his blood.” He emphasized its substitutionary aspect when he reminded the congregation to be aware “why God spared not his own Son but offered him a sacrifice upon the cross, delivered him to death; namely, that his wrath might be lifted from us once more” (Martin Luther, Complete Sermons of Martin Luther, 4.1:190, 191).
Now the Reformation Theologians certainly embraced it and wrote on the subject. They just did not invent the concept after the Synod of Dort (1618–1619).
[Personally, I think theologians followed the wrong branch of historic thought ... payment of a debt to God by God that demands innocent blood shed for guilty is contra-scriptural to God's justice in the Law - which Paul says is GOOD - so I think Christus Victor is the more correct path of thought to follow. Christ did what He did to accomplish what he accomplished - redemption of a people and victory over death, sin and hell. Forgiveness is an act of love, not a monetary transaction in blood.]