Shadows-shine
I'm more inclined to believe that the anti-christ will be more than one individual, more like a movement. An anti christ is any thing that is contrary to the will of Christ or His commandments could be considered anti christ.
Etymology
It is made up of two roots: αντί + Χριστός (anti + Christos). "Αντί" can mean not only "against" and "opposite of", but also "in place of", "Χριστός", translated "Christ", is Greek for the Hebrew "Messiah" meaning "anointed," and refers to Jesus of Nazareth within Christian, Islamic and Messianic Jewish theology.
Many if not most of the Reformers believed Rome to be the Babylon in Revelation. Not only is it a city between seven hills, it was also for a period drunk with the blood of the saints. Its head puts himself in place of Christ as a mediator between God and men.
Revelation 6:9
And when he had opened the fifth seal, I saw under the altar the souls of them that were slain for the word of God, and for the testimony which they held:
From Revelation we gather that it is a religious institution.
Revelation 17:9
And here is the mind which hath wisdom. The seven heads are seven mountains, on which the woman sitteth.
John 16:2
They shall put you out of the synagogues: yea, the time comes, that whosoever kills you will think that he does God service.
Nicolaus Von Amsdorf (1483 - 1565)
"He (the antichrist) will be revealed and come to naught before the last day, so that every man shall comprehend and recognize that the pope is the real, true antichrist and not the vicar of Christ ... Therefore those who consider the pope and his bishops as Christian shepherds and bishops are deeply in error, but even more are those who believe the the Turk (ISLAM) is the antichrist. Because the Turk (ISLAM) rules outside of the church and does not sit in the holy place, nor does he seek to bear the name of Christ, but is an open antagonist of Christ and His church. This does not need to be revealed, but it is clear and evident because he persecutes Christians openly and not as the pope does, secretly under the form of Godliness." (Nicolaus Von Amsdorf, Furnemliche und gewisse Zeichen, sig.A2r.,v.)
Martin Luther (1483 - 1546)
"nothing else than the kingdom of Babylon and of very Antichrist. For who is the man of sin and the son of perdition, but he who by his teaching and his ordinances increases the sin and perdition of souls in the church; while he yet sits in the church as if he were God? All these conditions have now for many ages been fulfilled by the papal tyranny." (Martin Luther, First Principles, pp. 196-197)
Flacius (1570)
"The sixth and last reason for our separation from the pope and his followers be this; By many writings of our church, by the Divinely inspired Word, by prophecies concerning the future and by the special characteristics of the Papacy, it has been profusely and thoroughly proved that the pope with his prelates and clergy is the real true great antichrist, that his kingdom is the real Babylon, a never ceasing fountain and a mother of all abominable idolatry." (Flacius, Etliche Hochwichtige Ursachen und Grunde, warum das siche alle Christen von dem Antichrist ... absondern sollen)
Georg Nigrinus (1530 - 1602)
"The Jesuits claim to be sorely offended and have taken my declarations as an insult and blasphemy in branding the Papacy as the antichrist of which Daniel, Paul, Peter, John and even Christ prophesied. But this is as true as it is that Jesus is the Messiah, and I am prepared to show it even by their own definition of the word 'antichrist'." (Translated from "Nigrinus, Antichrists Grundliche Offenbarung" fol. 6v.)
"This Jesuit further contends that the Papacy cannot be antichrist because the Papacy has lasted for centuries, but that the antichrist is supposed to reign only for 3 1/2 years ... But no one doubts today that Daniel spoke of YEAR-DAYS, not literal days ... The prophetic time-periods of forty-two months, 1260 days, 1, 2, 1/2 times are prophetic, and according to Ezekiel 4, a day must be taken for a year." (Translated from "Nigrinus, Antichrists Grundliche Offenbarung" fols.28v. 29r.)
John Calvin (1509 - 1564)
"Though it be admitted that Rome was once the mother of all Churches, yet from the time when it began to be the seat of Antichrist it has ceased to be what it was before. Some persons think us too severe and censorious when we call the Roman Pontiff Antichrist. But those who are of this opinion do not consider that they bring the same charge of presumption against Paul himself, after whom we speak and whose language we adopt .. I shall briefly show that (Paul's words in II Thess. 2) are not capable of any other interpretation than that which applies them to the Papacy." (Institutes of the Christian Religion, Vol.3, p.149)
John Knox (1505 - 1572)
Yea, to speak it in plain words; lest that we submit ourselves to Satan, thinking that we submit ourselves to Jesus Christ, for, as for your Roman kirk, as it is now corrupted, and the authority thereof, whereon stands the hope of your victory, I no more doubt but that it is the synagogue of Satan, and the head thereof, called the pope, to be that man of sin, of whom the apostle speaks." (John Knox, The History of the Reformation of Religion in Scotland, p.65)
Thomas Cranmer (1489 - 1556)
"Whereof it followeth Rome to be the seat of Antichrist, and the pope to be very antichrist himself. I could prove the same by many other scriptures, old writers, and strong reasons." (Works by Cranmer, vol.1, pp.6-7)
Charles Spurgeon (1834 - 1892)
"It is the bounden duty of every Christian to pray against Antichrist, and as to what Antichrist is no sane man ought to raise a question. If it be not the popery in the Church of Rome there is nothing in the world that can be called by that name. If there were to be issued a hue and cry for Antichrist, we should certainly take up this church on suspicion, and it would certainly not be let loose again, for it so exactly answers the description."
"Popery is contrary to Christ’s Gospel, and is the Antichrist, and we ought to pray against it. It should be the daily prayer of every believer that Antichrist might be hurled like a millstone into the flood and for Christ, because it wounds Christ, because it robs Christ of His glory, because it puts sacramental efficacy in the place of His atonement, and lifts a piece of bread into the place of the Saviour, and a few drops of water into the place of the Holy Ghost, and puts a mere fallible man like ourselves up as the vicar of Christ on earth; if we pray against it, because it is against Him, we shall love the persons though we hate their errors: we shall love their souls though we loath and detest their dogmas, and so the breath of our prayers will be sweetened, because we turn our faces towards Christ when we pray." (Michael de Semlyen, All Roads Lead to Rome)
The great number of people who believed/believe this is not proof in and of itself, but in combination with scripture, history (burning of Bibles, and Bible translators, persecution of those who refuse to submit to Papal authority, murder, stealing, building glorious buildings with money from selling indulgences), practice (priest-craft, salvation by works, remission of sin through the church, idol worship, transubstantiation and so on) and doctrines of the Catholic Church it paints a pretty convincing picture.
Edited March 20th 2015;
It need not be Rome, but Rome does fit into the mold without too much effort.