Perhaps the finest teaching on the centrality of the cross and the atonement from this later period comes from the pen of Hugh Martin.
A.T.B. McGowan in The Emergence of Evangelicalism
A bit of fodder to push on with my thesis. Also, I recently discovered a 70 article by Martin on Adoption, interacting with R. S. Candlish’s The Fatherhood of God. Perhaps some quotes from that to come in following days. When you read Martin, you are lifted into the heavenlies.