John Chrysostom

The voice of the Lord is indeed sufficient to bear testimony to John's pre-eminence among men. But any one will find the real facts of the case confirming the same, by considering his food, his manner of life, the loftiness of his mind. …

Catena Aurea by Aquinas ↗

Cyril of Alexandria

But perhaps it does not concern us to excuse John upon this ground, for you confess that he is worthy of imitation, hence He adds, But what went ye out for to see? A prophet? Verily I say unto you, more than a prophet. For the prophets foretold that Christ would come, but John not only foretold that He would come, but also declared Him to be present, saying, Behold the Lamb of God.

Catena Aurea by Aquinas ↗

Ambrose of Milan

Indeed, greater than a prophet (or more than a prophet) was he in whom the prophets terminate; for many desired to see Him whom he saw, whom he baptized.

Catena Aurea by Aquinas ↗

Gregory the Dialogist

But what went you out into the desert to see? A prophet? Yes, I say to you, and more than a prophet. For the office of a prophet is to foretell things to come, not also to show them. John therefore is more than a prophet, because the one whom he had prophesied by going before, he also pointed out by showing. But since he is denied to be a reed shaken by the wind, since he is said not to be clothed in soft garments, since the name of prophet is declared to be inadequate for him, let us now hear what may worthily be said of him.

Forty Gospel Homilies, Homily 6 ↗

Bonaventure

But what did you go out to see? After the Savior commended John with respect to the merit of his life, here he commends him with respect to the office of teaching, and in right order, because a good life ought to come before authoritative teaching. Moreover, the office of teaching is commended in John in two ways, namely with respect to clarity in knowing and with respect to authority in teaching, which two things render the office of a teacher perfect. …

Commentary on Luke, Chapter 7 ↗