Don't have to try and redo everything the KJV translators gave there in 2 Thess.2. It's a simple matter to follow the context, because even the context in the Greek of 2 Thess.2:9 which Jesus comes to destroy reveals Paul was speaking of a singular false one.
KJV with
Textus Receptus Greek corrections:
2Thes.2
[
1] Now we beseech you, brethren, by the coming of our Lord Jesus Christ, and by our gathering together unto him,
[
2] That ye be not soon shaken in mind, or be troubled, neither by spirit, nor by word, nor by letter as from us, as that the day of Christ is at hand.
[
3] Let no man deceive you by any means: for that day shall not come, except there come a falling away first, and
[the] 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.
[
8] And then shall
[the] wicked be revealed, whom the Lord shall consume with the spirit of his mouth, and shall destroy with the brightness of his coming:
[
9]
[_ _ _ _ ] [_ _ _ ] whose coming is after the working of Satan with all power and signs and lying wonders,
[
10] And with all deceivableness of unrighteousness in them that perish; because they received not the love of the truth, that they might be saved.
[
11] And for this cause God shall send them strong delusion, that they should believe a lie:
[
12] That they all might be damned who believed not the truth, but had pleasure in unrighteousness.
.
> All of the above can be read and understood in the plural, when correctly translated from the TR Greek.
Unfortunately, it does appear that the translators did have an agenda in 1611.
Since the KJV Bible did come to be, right in the midst of the Protestant Reformation, the Pope couldn't help but be, the most notable candidate, for their fabrication of an antichrist.
A little word manipulation, and there it (he) is, the most hated singular non-entity in the world.
I just know that some day, I will meet old st, nick too!