I would say that John 3:14-16 is categorical in refuting any notion of anyone being excluded from salvation - whilst Romans 9 is less clear in its meaning. Certainly, Paul's conclusion does not support the Calvinist's interpretation. Paul is underlining the Jews' mistaken notion that works brought righteousness.
And if we don't assume that Paul's singling out of Pharaoh excludes any one of us from being so described (for surely Romans 3:10-18 has to be true of us with regard and in contrast to the perfection of Jesus / the law) then Paul is merely asserting that God has utilized all of man's wrongful deeds.
I just am still a little troubled by the language of Paul.
From the Mid-Acts Perspective that an objective study of the Scripture cannot but result in; John 3 concerns what Paul relates in Romans 15:8-12 as being God's plan and purpose for the Earth through John 3 via the nation Israel as His witness, but that Paul related earlier, in Romans 9-11, has been temporarily set aside, while God carries out what Paul relates God is doing during said interim; some of which is described in Romans 8.
In the words, He must first reconcile those fallen Heavenly Places back unto Himself (Eph. 6), via a New Creature (Rom. 8), and then that "short work" He "will make upon the earth" (Rom. 9).
Only then will the following be even possible...
"Thy kingdom come. Thy will be done IN earth, AS IT IS IN heaven." Matt. 6:10.
FIRST He must solve for...
Ephesians 6:12 For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places.
Once that is solved for, then comes The Wrath that will solve for what has been the result of those fallen High Places - the course of this world...
Ephesians 2:2 Wherein in time past ye walked according to the course of this world, according to the prince of the power of the air, the spirit that now worketh in the children of disobedience: 2:3 Among whom also we all had our conversation in times past in the lusts of our flesh, fulfilling the desires of the flesh and of the mind; and were by nature the children of wrath, even as others.
These things ever require not only long, ever interelated studies, but objectively sound ones.
Acts 17:11,12
Rom. 5:8