You are correct in that Isaiah and Ezekiel do not support the hypothesis that satan is being spoken of.
It is written, "Behold, I have created the smith that bloweth the coals in the fire, and that bringeth forth an instrument for his work; and I have created the waster to destroy." (Isa 54:16)
And the Lord Jesus said of satan, "Ye are of your father the devil, and the lusts of your father ye will do. He was a murderer from the beginning, and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it." (Jn 8:44)
By these two witnesses it is difficult reconcile what the Lord said with respect to the devil, "...from the beginning..." and, "Thou wast perfect in thy ways from the day that thou wast created, till iniquity was found in thee..." (Eze 28:15)
Hey
Well I believe in shadow and types thus the person really being spoken of is in the background,like a shadow..lol anyhow I believe many places speak of satan in his prior Glory.
I know most people see this as speaking of some Assyrian leader, but not me.
3Behold, the Assyrian was a cedar in Lebanon with fair branches, and with a shadowing shroud, and of an high stature; and his top was among the thick boughs.
4The waters made him great, the deep set him up on high with her rivers running round about his plants, and sent her little rivers unto all the trees of the field.
5Therefore his height was exalted above all the trees of the field, and his boughs were multiplied, and his branches became long because of the multitude of waters, when he shot forth.
6All the fowls of heaven made their nests in his boughs, and under his branches did all the beasts of the field bring forth their young, and under his shadow dwelt all great nations.
7Thus was he fair in his greatness, in the length of his branches: for his root was by great waters.
8The cedars in the garden of God could not hide him: the fir trees were not like his boughs, and the chestnut trees were not like his branches; nor any tree in the garden of God was like unto him in his beauty.
9I have made him fair by the multitude of his branches: so that all the trees of Eden, that were in the garden of God, envied him.
10Therefore thus saith the Lord GOD; Because thou hast lifted up thyself in height, and he hath shot up his top among the thick boughs, and his heart is lifted up in his height;