Is this 'the rapture'?:
51 Behold, I tell you a mystery: We all shall not sleep, but we shall all be changed,
52 in a moment, in the twinkling of an eye, at the last trump: for the trumpet shall sound, and the dead shall be raised incorruptible, and we shall be changed. 1 Cor 15
If it is, Paul has already made it clear, "then cometh the end":
23 But each in his own order: Christ the firstfruits; then they that are Christ`s, at his coming.
24 Then cometh the end, when he shall deliver up the kingdom to God, even the Father; when he shall have abolished all rule and all authority and power.
25 For he must reign, till he hath put all his enemies under his feet.
26 The last enemy that shall be abolished is death. 1 Cor 15
"Then cometh the end", no mention of a seven year tribulation or conversions or another 1000 years of human existence on earth. The kingdom has been already, Christ has reigned already.
You do well to separate these verses because the former is distinctly in regards to the Rapture and applicable to believers, while the Second simply presents the order, which separates Christ's glorification from those at His Coming, and then comes the end. If there is only one, why point out "...each in his own order?"
And the mention of the Millennial Kingdom is found in Revelation 20. You refuse to accept that, and how that correlates to all Prophecy, and spiritualize it away. There we see that only one group is resurrected, that being Tribulation Martyrs. It is not for a thousand years that the general resurrection, at which time unbelievers are raised.
And Christ has not yet taken possession of the earth as is stated in Prophecy:
Revelation 11:15
King James Version (KJV)
15 And the seventh angel sounded; and there were great voices in heaven, saying, The kingdoms of this world are become the kingdoms of our Lord, and of his Christ; and he shall reign for ever and ever.
This does not detract from the Sovereignty of God, simply points out what Scripture points out elsewhere in regards to powers that have control in the world today.
God bless.