You asked questions and I've answered. You asked how John could have not died and then stated there is no biblical proof of anyone being translated without dying. I'll say this as well. The narrative that the Bible says the Moses died is incorrect as well. He was also taken to heaven as so he could be at the mount of transfiguration with Jesus. This proves that John certainly could be translated and remain on the earth. The Lord can create or organize the Universe but he can't give John immortality for a time?
Matthew 16:27-28, "27 For the Son of man shall come in the glory of his Father with his angels; and then he shall reward every man according to his works. Verily I say unto you, There be some standing here, which shall not taste of death till they see the Son of man coming in his kingdom.
Luke 9:27, "27 But I tell you of a truth, there be some standing here, which shall not taste of death, till they see the kingdom of God.
So, why do I see that this could only be John? Because, we know the way the others died. John was the last one alive and thought to have died around 98 AD. He was the only one that did not die as a martyr. He's the only one Jesus was talking about because of this. Eight days later, he took Peter, James and John to the mount of configuration. Peter and James died as martyrs. Not John. So, the only one possible he was talking about was John who would not die until his return. In our Scriptures, the Doctrine and Covenants, chapter 7 reveals this obvious logical fact by the Prophet of God. You follow your scholars who deny this and I'll follow the one who can logically conclude the obvious.