Steaver, remember that this knowing good and evil came from eating from the tree of the knowledge of good and evil. So there is a reason that it is called "the knowledge of good and evil." This does not mean or imply in any way that one had to eat from this tree to know good. Otherwise, Adam and Eve would have had to disobey God to know good. I see nothing in the text or in the character of God to support such a view.
Some think that the use of "good and evil" together is what is called a merism - it is taking two things to mean one - like saying "it's raining cats and dogs," or "For example, in
Genesis 1:1, when God creates
the heavens and the earth (
KJV), the two parts combine to indicate that God created the whole
universe. Similarly, in
Psalm 139, the psalmist declares that God knows
my downsitting and mine uprising; indicating that God knows all that he does" (look up Merism in Wikipedia).
So the meaning is not that Adam had to sin to know good, but to "know good and evil" which is another thing altogether.
There is nothing to support your view that Adam did not know God was good until he sinned. This is just your view. Essentially, you are trying to make it seem like sin was necessary for man to know God, and I see nothing in the bible to support this view.
I have to say that this is what Wiccans and others say - you can't know love without hate, dark without light, good without evil, sweet without bitter, etc. I reject that view completely for many reasons, mostly because it is not a biblical worldview.