None other than SBC Founder William B. Johnson, the Convention's first President, held to the moral government understanding of the atonement.
His sermon "Love Characteristic of the Deity", expounding the moral government view centered on God's love:
Founders Ministries • Sermons
"Taking this view of the atonement then, it will evidently appear, that the love of God is the procuring cause of the atonement....it represents him as an amiable Father, and infinitely benevolent moral Governor" — William B. Johnson
From the history of SBTS, regarding the creation of the seminary's Abstract of Principles in the 1850s:
Southern Baptist Seminary 1859-2009 by Gregory A. Wills
"there was one other view prevailing among Southern Baptists...a universal atonement based on a 'moral government' view of Christ's death....prominent Southern Baptists held this view, William B. Johnson and Edwin Mims, Boyce's predecessor at Furman." In drafting the Abstract of Principles, Basil Manley made sure to "accommodate the moral government view."
More on the Southern Baptist Convention's founding president's moral government view of atonement:
Studies in Baptist History, chapter on William B. Johnson
"For example, within his sermon, Eternal Misery the Desert of the Sinner, he refers, on several occasions, to God as being the 'Moral Governor of the Universe', in a manner similar to Hugo Grotius (1583-1645)."
[Church History: Hugo Grotius]
His sermon "Love Characteristic of the Deity", expounding the moral government view centered on God's love:
Founders Ministries • Sermons
"Taking this view of the atonement then, it will evidently appear, that the love of God is the procuring cause of the atonement....it represents him as an amiable Father, and infinitely benevolent moral Governor" — William B. Johnson
From the history of SBTS, regarding the creation of the seminary's Abstract of Principles in the 1850s:
Southern Baptist Seminary 1859-2009 by Gregory A. Wills
"there was one other view prevailing among Southern Baptists...a universal atonement based on a 'moral government' view of Christ's death....prominent Southern Baptists held this view, William B. Johnson and Edwin Mims, Boyce's predecessor at Furman." In drafting the Abstract of Principles, Basil Manley made sure to "accommodate the moral government view."
More on the Southern Baptist Convention's founding president's moral government view of atonement:
Studies in Baptist History, chapter on William B. Johnson
"For example, within his sermon, Eternal Misery the Desert of the Sinner, he refers, on several occasions, to God as being the 'Moral Governor of the Universe', in a manner similar to Hugo Grotius (1583-1645)."
[Church History: Hugo Grotius]