The Ancient Christian Commentary on Scripture series was one of the 50 best-selling resources of 2014. I think it would be very appropriate if we were to have access to the corresponding Ancient Christian Doctrine series.
It follows the same basic format as the Ancient Christian Commentary on Scripture series, but collects statements from the Church Fathers on doctrine using the articles of the Nicene Creed as the basic structuring tool. Invaluable, in my opinion!
Sample Pages
Series Introduction