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The answer seems indeed to be John Chrysostom (meaning Golden Mouth), the famous fourth century church father, theologian, liturgist, and preacher, who wrote commentaries on almost every single book in the New Covenant, the main reason for this residing in the fact that none of the previous systematical exegetical works contain a commentary on the two Pauline epistles addressed to the Corinthians, specifically. Philip Schaff's main edition of the church fathers can be found listed in both chronological and alphabetical order, together with a large appendix.
If one is curious about what the fathers of the preceding three centuries had to say on the topic, I recommend the following method:
Ctrl + F
, and type in 1 cor. xii.