Hi Jaybird88, we were created in the image of our Creator, not in the image of the Creator AND the creature (the sons of the Most High are created beings, such as the elect angels).
As for the passage not proving that fact, while v26 may leave some doubt as to who "Us" and "Our" is referring to, the following verse (v27) clears that up nicely for us. There are also a number of other passages that continue to make clear Whose image we were created in, both in the OT and the New (and here are two of them, along with the Genesis 1 passage).
Genesis 1
26 Then God said, “Let Us make man in Our image, according to Our likeness; and let them rule over the fish of the sea and over the birds of the sky and over the cattle and over all the earth, and over every creeping thing that creeps on the earth.”
27 God created man in His own image, in the image of God He created him; male and female He created them.
Genesis 5
1 This is the book of the generations of Adam. In the day when God created man, He made him in the likeness of God.
Genesis 9
6 Whoever sheds man’s blood,
By man his blood shall be shed,
For in the image of God
He made man.
There are also other passages where God refers to Himself in the plural. Genesis 3:22, 11:7 come quickly to mind.
Passages such as these (that have God referring to Himself as, "Us" or "Our") were part of what led the church to create the doctrine of the Trinity. It was never meant as an attempt to "explain" the mystery to us (as if we could wrap our minds around it/understand it) because that is clearly beyond any of us, rather, the point of the doctrine is to circumscribe and safeguard the truth that the Bible teaches us about the Godhead.
~Deut
Matthew 22
41 While the Pharisees were gathered together, Jesus asked them a question:
42 “What do you think about the Christ, whose son is He?” They said to Him, “The son of David.”
43 He said to them, “Then how does David in the Spirit call Him ‘Lord,’ saying,
44 ‘THE LORD [YHWH] SAID TO MY LORD [Adonai],
“SIT AT MY RIGHT HAND,
UNTIL I PUT YOUR ENEMIES BENEATH YOUR FEET” ’?
45 “If David then calls Him ‘Lord,’ how is He his son?”
46 No one was able to answer Him a word, nor did anyone dare from that day on to ask Him another question.
.