Final answer:
Stanley Horton was best known for his service as a theologian and seminary professor, contributing significantly to Pentecostal education and theology.
Step-by-step explanation:
Stanley Horton is best known for his service as a theologian and seminary professor. Although the information provided discusses Charles Grandison Finney, a different figure in the history of evangelical movements, Horton's notable contribution lies in his impactful role in Pentecostal education and theology. He was a distinguished scholar within the Assemblies of God denomination, having written extensively on Pentecostal history and theology. Horton's work and influence in religious academia have made a significant impact on the study and practice of Pentecostalism.