You kind of have a weird way of arranging appointments and time slots, yet I know you say the same of me.
I have considered that Rev. 19 could have been fully played out in the first century, and white horse Jesus coming in judgement could have not been His final second coming to judge the whole world.
None the less both these interpretations would cut the sea and earth beasts out of the action in the final tribulation, and in that case they would both fall short of qualifying as a final one man "The Antichrist".
As to whether or not there will be one evil man ruling the world shortly before it ends, I can not use the Bible to prove either way.
I am guessing that you are expecting the "man of sin" to come during or after your pre-trib rapture, while I see him as a character of the past.
That's why I also referred to the Anti-Christ as he/them. It could be a beast system. Whoever it is will end up trying to declare himself/themselves as God, which is why they get cut off and thrown into the Lake of Fire after the 7 years are over. As for the rapture, I've seen people point out scripture for every scenario and any of them could be possible, but I can definitely see the pretribulation making sense. At the very least, I see true believers as being sealed like the 144,000 and not harmed by the judgements that God/Jesus throws out on the earth during his time of wrath, since the Bible says in 1 Thessalonians 5:9 that the elect were not appointed for wrath.