Ryan—a Reformed brother in Christ, whose blog, UNAPOLOGETICA, I have followed for a number of years now—has just published a lengthy compilation of early Church Fathers who affirmed the doctrine that God the Father is the only person of the Godhead who is autotheos (i.e. God in and of Himself).
The actual document is, "74 pages of quotes by 20 early church fathers"; introduction and link to the compilation HERE.
Anyone who has interest in Christian theology, and the development of the doctrine of the Trinity, will certainly appreciation Ryan's contribution.
Grace and peace,