13 If there is no resurrection of the dead, then not even Christ has been raised. 14 And if Christ has not been raised, our preaching is useless and so is your faith. 15 More than that, we are then found to be false witnesses about God, for we have testified about God that he raised Christ from the dead. But he did not raise him if in fact the dead are not raised. 16 For if the dead are not raised, then Christ has not been raised either. 17 And if Christ has not been raised, your faith is futile; you are still in your sins. 18 Then those also who have fallen asleep in Christ are lost. 19 If only for this life we have hope in Christ, we are of all people most to be pitied.
You quoted 1 and 2 of 1 Cor. 15. Paul is showing that if there is no gospel or good news and if Christ is not resurrected, then faith is in vain because without Christ's resurrection, there can be no oneraised from the dead at all.
Paul continues, Christ has indeed been raised from the dead. And who will be resurrected and made alive? Verse 22 gives you the answer.
20 But Christ has indeed been raised from the dead, the firstfruits of those who have fallen asleep. 21 For since death came through a man, the resurrection of the dead comes also through a man. 22 For as in Adam all die, so in Christ all will be made alive. 23
The entire chapter deals with the question of whether the gospel is truth or not. Whether Christ was resurrected or not. Because without it no one will live and with it ALL will live.