"And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: he [SINGULAR]was cast out into the earth, and his [SINGULAR] angels were cast out with him" Revelation 12:9
"In that day the Lord with his sore and great and strong sword shall punish leviathan the piercing serpent, even leviathan that crooked serpent; and he shall slay the dragon that is in the sea." Isaiah 27:1
"Canst thou draw out leviathan with an hook? or his tongue with a cord which thou lettest down? ....His scales are his pride, shut up together as with a close seal....Out of his nostrils goeth smoke, as out of a seething pot or caldron...His breath kindleth coals, and a flame goeth out of his mouth...He beholdeth all high things: he is a king over all the children of pride" Job 41.
"Thou hast been in Eden the garden of God; every precious stone was thy covering, the sardius, topaz, and the diamond, the beryl, the onyx, and the jasper, the sapphire, the emerald, and the carbuncle, and gold: the workmanship of thy tabrets and of thy pipes was prepared in thee in the day that thou wast created." Ezekiel 28:13
Was the king of Tyre ever in the Garden of Eden?? Don't think so.
Quite a bit of difference between Satan and Adam. It is you who is doing the speculating because every reference you have made is an appeal to your own understanding while ignoring what the Bible says in black and white.