Simon Peter.
Why? 
He's widely considered the first pope and one of the founders of Christianity.
-Hedge
That is another difference between RC and the Bible.
from:
www.biblestudylessons.co m/cgi-bin/gospel_way/peter_as_pope.php Was the Apostle Peter the first Pope, the earthly head of the church according to the Bible? Was he the Chief Shepherd, the Supreme Pontiff, and Vicar of Christ? Is the Roman Catholic church the true church as proved by a succession of the Papacy since Peter? Does the Bishop of Rome have authority to declare church law? Does the Bible teach that the Papacy is the foundation of the church? What about celibacy? Should we bow to honor the Pope as the Holy Father?
Introduction:
Several religious groups teach as fundamental doctrine that Peter was the first earthly head and Chief Shepherd (pastor) of the church, and modern church leaders are his successors. Others claim that the Papacy is the foundation of the church. Consider this quotation:
"The Pope ... is the bishop of Rome and the Vicar of Christ on earth. He is the visible head of the whole Catholic Church ... Who was the first Pope? St. Peter, who was made Pope by Jesus Christ Himself ... Did Peter's authority die with him? No, it was handed down to a man named Linus, and after he died, it was handed down to another, and so on, during the past 2000 years ... Does Jesus require us to follow the Pope in matters of religion? Yes, because obedience and loyalty to the Pope are among the chief requirements of the Lord's plan for unity in His church" (A Catechism for Adults, by William Cogan, 1975 ed., pp. 55,56).
In this study we want to see what the Bible says about this doctrine. If it is true, as important as it is, we will surely find it in the Bible.
We have no personal ill-will toward any, nor do we want to misrepresent anyone. But we do urge people to seek for truth with an open mind. "Put your own selves to the test, whether you are in the faith; prove yourselves" (2 Corinthians 13:5). To do this we must "study the Scriptures every day to see whether these things are so" (Acts 17:11). No one should fear to examine his beliefs according to the Bible.
(Note: all Scripture quotations will be from the St. Joseph New Catholic Edition of the Holy Bible - Confraternity Edition. All other quotations are from officially recognized Roman Catholic sources.)
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Part I. Did Jesus Establish the Office of Pope?
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Obviously Peter could be Pope only if Jesus authorized the existence of that office. So let us consider what Jesus' word says.
A.
The Office & Qualifications of the Pope
Are Nowhere Mentioned in the Scriptures.The Bible specifically names several offices in the church and describes the work and qualifications of those who hold that office.
Office Named Qualifications Work
Apostles Eph. 4:11; Matt. 10:2-4;
Luke 6:13-16 Acts 1:21-26;
2 Cor. 12:11,12 Eph. 3:3-5;
Acts 10:39-41
Elders or Bishops Phil. 1:1; Acts 14:23;
Eph. 4:11 1 Tim. 3:1-7;
Titus 1:5-9 Acts 20:28;
1 Peter 5:1-3
Deacons Phil. 1:1 1 Tim. 3:8-13 Acts 6:1-6
The Bible contains several passages where the office of Pope ought to be mentioned, if it existed. Ephesians 4:11,12 and 1 Corinthians 12:28 list various officers and workers in the church, but the office of Pope is not mentioned. Why not?
Paul wrote several letters to and from Rome, naming many people there (Rom. 16; Col. 4:7-14; 2 Tim. 4:9-22; Philem. 23,24). If Peter was Pope in Rome, surely Paul would have mentioned him. But Paul mentions neither Peter nor anyone else as being Pope.
Who can imagine someone today writing official letters to or from the church in Rome, listing the officers of the Catholic Church, giving all this information about the work and qualifications of lesser officers, but never mentioning the Pope? If the office of Pope was established by Jesus, why does the New Testament fail to mention it?
B.
The Bible Says Jesus Is the Head of the Church.The Pope is believed to be the head of the church, but note:
Ephesians 1:22,23 - Jesus is head over all things to the church (cf. Col. 1:18). What is there left for a Pope to be head of?
Ephesians 5:22-24 - A husband is head of his wife as Jesus is head of the church. But for a wife to submit to two husbands is adultery (Rom. 7:2,3). So for the church to submit to two heads (Jesus and the Pope) would be spiritual adultery.
Matthew 28:18-20 - Christ has all authority in heaven and on earth. He is the one lawgiver (James 4:12). To claim that the Pope may issue religious laws is to deny the unique power of Jesus.
The Bible plainly states that Jesus is Head of the church. He is the one Lord in the one body (church). There cannot be two Lords any more than there could be two Gods (Eph. 4:4-6). Bishops (even from Rome) are forbidden to lord it over the flock (1 Peter 5:1-3).
C.
The Bible Says Jesus Is the Church's Foundation."The primacy of St. Peter was ... an essential part of Christ's church, the rock on which it was built ... The House of God will always need its foundation" (The Question Box, Bertrand Conway, 1929 Edition, pp. 153,154).
Hence, the authority of Popes is said to be the foundation of the Catholic Church. But the Bible says:
God's church has a divine foundation.
1 Corinthians 3:11 - There can be no foundation other than Jesus.
1 Peter. 2:3-8 - Peter himself taught that Jesus is the chief cornerstone on which the church is built. [Cf. Acts 4:10-12.]
Matthew 16:13-18 - This passage is often used to try to prove Peter is the foundation of the church (Catechism, p. 56; Question Box, p. 146). But the passages already studied prove that Jesus, not Peter or the Pope, is the foundation of the church. Matthew 16. actually confirms this truth.
The context (v13,15,16) is not discussing who Peter is nor what his position is, but who Jesus is and what His position is. The passage does not exalt Peter; it exalts Jesus. Jesus does not confess Peter; Peter confesses Jesus.
The verse is not saying Peter is the rock on which the church is built, but rather it contrasts Peter's name (Greek PETROS, masculine - a piece of rock) to the rock on which the church would be built (Greek PETRA, feminine - a solid ledge of rock).
Jesus often compared Himself to inanimate objects - a temple (John 2:18-22), a door (John 10:7), a vine (John 15:1-11). Here He compares Himself to a rock, a name often used for Deity in the Old Testament (Psa. 31:3; 71:3; 89:26ff; 18:2f,32f).
The foundation of the church is not Peter. It is the truth that Peter had just confessed - that Jesus is the Christ the Son of God (v16). This is confirmed by the context and by other Scriptures. To say Peter is the foundation would be to put a man in the place of Deity!
The lives of Peter and of the Popes make them entirely unfit to be the foundation of Jesus' church.
Consider some great sins in the life of Peter.
* Immediately after talking about the foundation of the church, Christ rebuked Peter saying: "Get behind me, satan, thou art a scandal to me; for thou dost not mind the things of God, but those of men" (Matthew 16:21-23).
* Peter denied Jesus 3 times, even with curses and swearing (Matthew 26:69-75).
* Jesus rebuked Peter's lack of faith (Matthew 14:22-31).
* Peter was hypocritical and disobeyed the gospel (Galatians 2:11ff).