GOD is the "one" only Savior.
Isaiah 43 KJV
(11) I, even I, am the LORD; and beside me there is no saviour
John 4 KJV
(42) And said unto the woman, Now we believe, not because of thy saying: for we have heard him ourselves, and know that this is indeed the Christ, the Saviour of the world.
Either GOD is "one" as a unity of more than one member, or one of the above scriptures cannot be true.
Nope, that is yet another case of what is called "special pleading" just as the majority do with passages like John 10:30. The only way to make John 10:30 mean that "Jesus is God Almighty" is to ignore the companion context from John 17 which I posted. The same is true with the Isa 43:11 passage you have posted. The word for Savior there is Moshia, (a form of yasha), but the same word is also used for other "Saviors" and "Deliverers" already elsewhere in the Tanach. There are various Saviors and Deliverers throughout the history of Israel and the scripture; and there are likewise various ways in which the word Elohim, (God), is used throughout the scripture. Moses was also called an Elohim. Certain Elders were also called Elohim-Judges. Angels are also called Elohim. Othniel the son of Kenaz is called a Moshia-Savior-Deliverer. Ehud the son of Gera is also called a Moshia-Savior-Deliverer. Jehoahaz is also called a Moshia-Savior-Deliverer:
Judges 3:9 - Othniel the son of Kenaz - "Moshia"
Judges 3:15 - Ehud the son of Gera - "Moshia"
2 Kings 13:5 - Jehoahaz the son of Jehu - "Moshia"
Exodus 7:1 - Moses = Elohim (to Pharaoh)
Exodus 21:6 - Elohim = Judges
Exodus 22:8 - Elohim = Judges
Exodus 22:9a - Elohim = Judges
Exodus 22:9b - Elohim = the Judge
Psalm 8:5 (Heb 2:7-9) - Elohim = Angels (in some translations)
Psalm 8:5 (Heb 2:7-9) - Elohim = God (in some translations (Psa 8:5 ASV))
Psalm 97:7 - Elohim = Angels (LXX)
Psalm 138:1 - Elohim = Angels (LXX)
Psalm 82:6-7 (John 10:34-35) - Elohim = Sons of the Most High
Sons of the Most High = Those to whom the Logos of Elohim has come (John 10:35)
Isaiah 43:11
11 I, I am יהוה, and besides Me there is no Moshia.
So you see that the Father is the Ultimate Moshia-Savior-Deliverer but He also sends Moshia-Savior-Deliverers to His people. The Anointed One in the Gospel accounts is the final Moshia and there is no other name under the heavens that is given among men whereby we must be saved-delivered: but that does not make him the Almighty Elohim any more than it would make any of the other people listed above into the Almighty Elohim. Is Moses the Almighty Elohim just because he was also called an Elohim? Are those to whom the Word of Elohim has come suddenly the Almighty Elohim just because they are called Elohim? And what about those who were also called Elohim-Judges? And are the Angels Almighty Elohim just because they are also called Elohim? And is Othniel the son of Kenaz the Almighty Elohim just because he is called a Moshia-Savior-Deliverer? Is Ehud the son of Gera the Almighty Elohim just because he is also called a Moshia-Savior-Deliverer? Is Jehoahaz the Almighty Elohim just because he is also called a Moshia-Savior-Deliverer? They only way for you to make the case you are trying to make by the passage you have quoted is by what is called special pleading, that is to say, "It should mean Almighty Elohim in this place because it makes my point but not anywhere else where it might refute my point!" Sorry, but special pleading has no place when one is sincerely and diligently searching for the truth, (not that you are not sincere in your endeavors but just saying, time to get real, lol).