Church historian and biblical scholar Kevin Giles in his book The Eternal Generation of the Son provides the following list:

Irenaeus, Ag. Her. 3.6: The Father is the only God and Lord who alone is God and ruler of all.”

Justin Martyr, Dial. Trypho 13.3: The Son is the “second God” worshiped “in secondary rank.”

Tertullian, Ag. Prax. 7.15: The Son “second to the Father”; the Spirit “third from God.”

Clement, First Letter Corinthians 42.1-2: “Christ is from God, and the apostles are from Christ: thus both came in proper order by the will of God.”

Origen, Cont. Cel. 5.9: The Son is “secondary in rank” and the Spirit “third rank.”

Reformation

Bishop George Bull, Defenso Fidei Nicaenae: The Son “in respect to his divinity, is a degree subordinate to the Father, insomuch as he is from him.”

Bishop John Pearson, Exposition of the Creed: “The Father is greater (than the Son).”

Samuel Clarke, The Scripture-doctrine of the Trinity: The Son “is evidently subordinate to the Father, that he derives his being, attributes, and powers, from the Father, and the Father nothing from him.”

Presbyterian Charles Hodge, Systematic Theology 1:467: The Trinity summed up by “three essential facts: unity of essence, distinction in persons and subordination.”