Your claim is that pisteuo means to obey. Even in the "evidence" that you've presented, there is NO MENTION of obedience. I have no idea why you've highlighted "saving faith in red. Yes, believing is doing something, but that doesn't equate to believing being obedience.
Saving faith is in the definition of Pisteo.
Faith without the work or act of obedience is dead.
Therefore I say that Pisteo carries the idea of obedience, since it has saving faith, ie; doing something in its definition.
As you have been shown by many scriptures, repentance is a foundational concept of the Gospel.
Turning away from Satan, as the lord you obey and turning to Jesus as the Lord you obey, is how the bible teaches we are forgiven of sins.
18 To open their eyes, and to turn them from darkness to light, and from the power of Satan unto God, that they may receive forgiveness of sins, and inheritance among them which are sanctified by faith that is in me. Acts 26:18
...that they may receive forgiveness of sins.
I believe we need to balance what the scriptures say, as a whole.
JLB