The man of sin, the antichrist has already been revealed, anti means in place of, the antichrist is someone in place of Christ who would look and sound like Christ, a wolf in sheep's clothing
2 Thessalonians 2:3-7
(3) Let no man deceive you by any means: for that day shall not come, except there come a falling away first, and that man of sin be revealed, the son of perdition;
(4) Who opposeth and exalteth himself above all that is called God, or that is worshipped; so that he as God sitteth in the temple of God, shewing himself that he is God.
(5) Remember ye not, that, when I was yet with you, I told you these things?
(6) And now ye know what withholdeth that he might be revealed in his time.
(7) For the mystery of iniquity doth already work: only he who now letteth will let, until he be taken out of the way.
1 John 4:3
(3) And every spirit that confesseth not that Jesus Christ is come in the flesh is not of God: and this is that spirit of antichrist, whereof ye have heard that it should come; and even now already is it in the world.
Cannot get any plainer than that "already in the world" that was in the early church when the antichrist was already working, so the beginning of Jonathan's chart is wrong according to these texts.