Isaiah 43:11 I, even I (Jesus), am the LORD (Jehovah); and beside me there is no saviour.
Isaiah 43:15 I am the LORD (Jehovah), your Holy One, the creator of Israel, your King.
John 1:3 All things were made by him (Jesus); and without him was not any thing made that was made.
John 1:10 He was in the world, and the world was made by him, and the world knew him not.
John 8:29 And He (Our Father) that sent me is with me: the Father hath not left me alone; for I do always those things that please him. As a man Jesus took on Him the place as servant.
Philippians 2:5 Let this mind be in you, which was also in Christ Jesus:
Philippians 2:6 Who, being in the form of God, thought it not robbery to be equal with God:
Philippians 2:7 But made himself of no reputation, and took upon him the form of a servant, and was made in the likeness of men:
John 17:5 And now, O Father, glorify thou me with thine own self with the glory which I had with thee before the world was.
Matthew 28:18 "And Jesus came and spake unto them, saying, All power is given unto me in heaven and in earth," and that will be especially manifest in Revelation 1:8 I (Jesus) am Alpha and Omega, the beginning and the ending, saith the Lord, which is, and which was, and which is to come, the Almighty.
I'm not going to discuss the interpretation of the NT verses you quoted unless you ask me to. However, your interpretation of Isaiah 43:11 must be addressed. You are reading "Jesus" (Yeshua) into the text. You are taking the words "beside me there is no saviour" too literally. Since you correctly believe Yeshua is our Saviour, you then make the unwarranted leap to say the saviour of verse 11 must be Yeshua. Yeshua's Father, YHWH (the LORD), is the ultimate Saviour of mankind. He achieves this work of salvation by appointing His only begotten Son Yeshua to carry out that work. He made His Son to be the Saviour of the world (Acts 5:31; 13:23).
The word “Saviour” in Isa 43:11 is the Hebrew “yasha” (Strong’s #3467).
Here is how “yasha” was used in Judges 6:14-15:
“And Yahweh looked upon him [Gideon], and said, Go in this your might, and you shall save [yasha] Israel from the hand of the Midianites: have not I sent you? And he said unto Him, Oh my Adonai, how shall I save Israel? behold, my family is poor in Manasseh, and I am the least in my father’s house.”
These words were spoken to Gideon long before Yahweh used Isaiah to prophesy about there being no Saviour besides Him.
Here are a few more examples:
“And Yahweh gave Israel a saviour [yasha], so that they went out from under the hand of the Syrians: and the children of Israel dwelt in their tents, as beforetime.” 2 Kings 13:5
We learn that the saviour Yahweh gave them was Joash (vs.25).
Isaiah prophesied that Yahweh would send a future saviour to Egypt to deliver them from their oppressors.
“And it shall be for a sign and for a witness unto Yahweh of hosts in the land of Egypt: for they shall cry unto Yahweh because of the oppressors, and He shall send them a saviour [yasha], and a great one, and he shall deliver them. “ Isaiah 19:20
Nehemiah 9:27 speaks of saviours that Yahweh sent to save Israel.
“Therefore you delivered them into the hand of their enemies, who vexed them: and in the time of their trouble, when they cried unto you, you heard them from heaven; and according to your manifold mercies you gave them saviours [yasha], who saved [yasha] them out of the hand of their enemies.”
Obadiah also prophesied about a future saviour that will be sent to Israel.
“And saviours [yasha] shall come up on mount Zion to judge the mount of Esau; and the kingdom shall be Yahweh’s.” Obadiah 1:21
From the Scripture references given above, it is clear that there were other saviours besides Yahweh both before and after the words spoken by Isaiah. How are we to take those apparent contradictions?
It seems obvious to me that when Yahweh said there was no other Saviour except Him, He was declaring Himself the ONE TRUE SAVIOUR. As such, He can choose any method He wants to save people. He can choose to save by Himself or He can choose to save by raising up men to act as saviours. The men He raises up do not replace Yahweh as the ultimate Saviour from whom all salvation flows. They are vessels through whom Yahweh saves. If Yahweh can and has used men in the past to be saviours, then why can’t He use His Messiah to save people as well? If Yahweh can use men to bring about a temporal salvation to His people, why can’t He use His Messiah to bring about an eternal salvation for His people? He can and He has.
He has also placed in Torah the life of Joseph which is an uncanny parallel with the life of Yeshua. Yahweh used Joseph to save not only the children of Israel, but many others from the nation stricken by the famine. Consider the following two verses.
Genesis 45:7 – And Elohim sent me before you to preserve you a posterity in the earth, and to
save your lives by a great deliverance.
Genesis 50:20 - But as for you, you thought evil against me; but Elohim meant it unto good, to bring to pass, as it is this day,
to save much people alive.
The starving nations had to come to Joseph for food and to save their lives. He was a type of Messiah Yeshua to whom the world must come for spiritual food and salvation. Just as Pharaoh appointed Joseph second in command and used him to save the people, Yahweh appointed Yeshua second in command and Saviour of the world. If Yahweh could use Joseph to save people, He could use His Messiah, Yeshua, to save people as well. However, the salvation we receive through Yeshua is far more efficacious than the temporal salvation received through Joseph. For salvation through Yeshua is eternal.