I have some that are a little less vague:
"The Lord says to Peter: ‘I say to you,’ he says, ‘that you are Peter, and upon this rock I will build my Church.’ . . . On him [Peter] he builds the Church, and to him he gives the command to feed the sheep [John 21:17], and although he assigns a like power to all the apostles, yet he founded a single chair [cathedra], and he established by his own authority a source and an intrinsic reason for that unity. Indeed, the others were that also which Peter was [i.e., apostles], but a primacy is given to Peter, whereby it is made clear that there is but one Church and one chair. So too, all [the apostles] are shepherds, and the flock is shown to be one, fed by all the apostles in single-minded accord. If someone does not hold fast to this unity of Peter, can he imagine that he still holds the faith? If he [should] desert the chair of Peter upon whom the Church was built, can he still be confident that he is in the Church?" (Cyprian of Carthage, The Unity of the Catholic Church 4; 1st edition [A.D. 251]).
"[Christ] made answer: ‘You are Peter, and upon this rock will I build my Church. . . .’ Could he not, then, strengthen the faith of the man to whom, acting on his own authority, he gave the kingdom, whom he called the rock, thereby declaring him to be the foundation of the Church [Matt. 16:18]?" (Ambrose of Milan, The Faith 4:5 [A.D. 379]).
"Philip, the presbyter and legate of the Apostolic See [Rome] said: ‘There is no doubt, and in fact it has been known in all ages, that the holy and most blessed Peter, prince and head of the apostles, pillar of the faith, and foundation of the Catholic Church, received the keys of the kingdom from our Lord Jesus Christ, the Savior and Redeemer of the human race, and that to him was given the power of loosing and binding sins: who down even to today and forever both lives and judges in his successors’" (Acts of the Council of Ephesus, AD 451, session 3).
And a last one, a bit more modern:
The obvious pun which has made its way into the Greek text . . . suggests a material identity between petra and Petros . . . as it is impossible to differentiate strictly between the two words. . . . Petros himself is this petra, not just his faith or his confession. . . . The idea of the Reformers that he is referring to the faith of Peter is quite inconceivable. . . . For there is no reference here to the faith of Peter. Rather, the parallelism of “thou art Rock” and “on this rock I will build” shows that the second rock can only be the same as the first. It is thus evident that Jesus is referring to Peter, to whom he has given the name Rock. . . . To this extent Roman Catholic exegesis is right and all Protestant attempts to evade this interpretation are to be rejected. (Dr. Oscar Cullman, writing in Gerhard Kittel's Theological Dictionary of the New Testament)
Yes, let the reader decide. Did God choose a fallible and sinful man upon which to build His church, or did He choose the divinely inspired eternal, unchanging confession re Christ, the Son of the living God.
The answer is obvious.
The presumption of the RCC that Peter is the first pope is read back into history. Eusebius notes this. I will dig up the info when I’m not on my phone.