Agree with your post in the main...except one point...I don't see any room in God's word that some can be saved after death....? Bible says it is appointed unto man but once to die and then the judgment. It seems contradictory to say that God wants us to testify so that nobody has an excuse...and then say some have the excuse of ignorance so they can be saved after death? Especially when the word says man is without excuse because even creation itself testifies of Him.
All will be judged, and none will have an excuse because all have a conscience and all can hear, in a sense, the word of God. But we know, from experience and from Scriptures, that sin has robbed mankind of the ability to hear God clearly at all times. Jesus said to forgive Israel "for they know not what they do." This means some were forgiven even in their ignorance--even if they died in their ignorance, simply because if they had known what they should do they would've done it.
So the testimony of the Gospel is God using men to reach men so that God is not bypassing the world that mankind chose to live in. God has committed Himself to the process by which people are used by God to reach out into the world where they live.
Angels are not sent down to save people. God doesn't win people with visions and signs primarily. What reaches people are people who themselves have chosen to receive redemption so that they have a valid offer for others of their own kind in their own condition.
Jesus was initially able to minister Eternal Life, whereas others before him had only preached its hope. And after Jesus his followers became able to minister Eternal Life to others, as well. Jesus and we have all lived in this world, and are given, by God, the capacity to share the grace we ourselves have received. This is how God testifies of Eternal Life to mankind. It is a long drawn-out process of ministry.
We also can forgive those who "know not what they do," even if they die before they fully understand. Obviously, if they "know not what they do" they do not yet fully understand! They can be Saved after death if they don't yet fully understand! If we were perfect, I suppose all would be adequately reached. But we are *not* perfect!
Since God has chosen this relatively slow process of using mankind who themselves have brought themselves into this fallen world, we know that the effectiveness of the ministry of men God uses is limited. God began with Israel and after a couple of thousand years reached out through them to the nations. But God could only use a limited number of people in Israel, due to human weakness and failure.
And once God reached the nations, those nations experienced the same traumatic process that Israel experienced, with a relative few able to reach out to those who didn't know but would respond. Some are effectively reached, whereas many remain inadequately touched, as opposed to those who outright reject the Gospel.
Not all those who respond to the Gospel are responsible with it. And so, many more will be granted Salvation after death for God's Kingdom than are actually effectively brought into Salvation in this life with the Gospel. Many, many people are not reached in this long drawn-out process, meaning that many who are unreached will be Saved, even though they were not successfully called into ministry, to be witnesses.
Paul said in Rom 2 that God judged some pagan Gentiles to be more righteous than Jews who had been under the Law, and yet not succeeding in it. And so, it is clear, at least to me, that God has always judged people by what they know, in a limited sense, and by what they do, even passing over their failures due to the troublesome nature of this world and sin.
God will judge people by His mercy, whether before or after death, but He will judge according to what people actually know and not by what they don't know. That is clear to me, since the Bible says that God will judge the whole world by His word of conviction.
If we're talking about what can bring us into Salvation now, so that we can testify of Christ to the world, that can only come in this life and through Christ. This is the thing that moves God's plan along, but He is still able to save those who fail, as well as those who had limited knowledge of right and wrong. My opinion only.