So since you are ignoring the whole spectrum of the scripture on the subject and resort to philosophical statements. ( Nothing wrong with philosophy.) Whom then or what is a greater God? The God who cannot sin because of some unknowable to man nature or the God that can yet has always and will always refuse to? Which of the two is the most worthy of praise?
Along the same lines. Which of the two Gods is justified in sending man to hell for eternity? The one who sends them to hell because of what their ancestor did. Because their ancestor gave his descendants some kind of unknowable to mankind sin nature that makes it impossible for them to do anything but sin. Or the God who personally reaches out to every individual and calls them to himself and reproves them for their sin and not heeding the call. Who expects them to heed which is in their power to do and to repent of the evil deeds they are voluntarily involved in? In other words the God who understands the circumstances mankind finds themselves in but sends men to hell who voluntarily choose the path of Adam rather than the path God provides for them.
If there was no list of people who did no sin, other than "sins not unto death," I might agree with your assessment of a "Possible God."
But, since there are several persons named by God, who were "righteous" men, I am reminded of Job's question - "Shall mortal man be more just than God? shall a man be more pure than his maker?"(Job 4:17)
Several men were righteous -
Gen 5:18 And Jared lived an hundred sixty and two years, and he begat Enoch:22 And Enoch walked with God after he begat Methuselah three hundred years, and begat sons and daughters:24 And Enoch walked with God: and he was not; for God took him.
Heb 11:5 By faith Enoch was translated that he should not see death; and was not found, because God had translated him: for before his translation he had this testimony, that he pleased God.
Jude 1:14 And Enoch also, the seventh from Adam, prophesied...
Eze 14:14 Though these three men, Noah, Daniel, and Job, were in it, they should deliver but their own souls by their righteousness, saith the Lord GOD.16 Though these three men were in it, as I live, saith the Lord GOD, they shall deliver neither sons nor daughters; they only shall be delivered, but the land shall be desolate.17 Or if I bring a sword upon that land, and say, Sword, go through the land; so that I cut off man and beast from it:
18 Though these three men were in it, as I live, saith the Lord GOD, they shall deliver neither sons nor daughters, but they only shall be delivered themselves. 19 Or if I send a pestilence into that land, and pour out my fury upon it in blood, to cut off from it man and beast:
20 Though Noah, Daniel, and Job, were in it, as I live, saith the Lord GOD, they shall deliver neither son nor daughter; they shall but deliver their own souls by their righteousness.
These are not the only "Righteous" Men or Women who are named "Righteous" by God, but these few should serve to illustrate the point.
And while I think of it, when someone reminds you of a verse that says "There is none righteous, no not one..." Remind them that it was a different time and place, because scripture never says "No man has ever been righteous." See the examples I have provided from Ezekiel and others.