I appreciate the Bible verses, as I do believe they are the very word of God; however, none of them convince me of an existence of purgatory.
I do believe the judgement day is a particular day coming, and then we are resurrected, and our bodies are reunited with our souls, and some go down to hell, and others to heaven.
However, in the interim, we read for example of the Rich Man and Lazarus. The Rich Man is in hell. And we go to the thief on the cross, who is told by Jesus, “Today you shall be with me in Paradise.”
So we see that dead men are in one place or the other.
As for Onesiphorus, I do not know that he was dead when Paul wrote 1st Timothy.
The “Paradise” that Christ spoke of was a waiting place. Where do you think all the good people of the Old Testament were until Jesus opened heaven?
You do believe that Jesus was the first one into heaven, don’t you?