The LXX uses holy angels so obviously it is not about people. Job 2:1 in Hebrew calls angels sons of God. This is a pattern throughout the Bible, conveniently ignored when it suits a particular reader.
Son of Man (in Hebrew ben Adam) simply means son of Adam (like the son of Abraham), denoting a lineage and nothing holy. It "becomes" holy in the NT (butthen the Nt was written for the Greeks who klnew nothing of Judaisn, nor did they speak Hebrew).
The same goes for the meshiyah (messiah), whose meaning in Hebrew is nothing like the NT "Christos." The anointed was any Jewish king. All Jewish kings were believed anointed and appointed by God.
The same goes for the "World to come" phrase, or the "Kingdom of heaven." This phraseology changed meaning the way English word "gay" attained different meaning over time. But they were used with specific goal (and meaning) in mind.
Which is okay, as long as we remember that this is something we could call man-made tradition, choose and preference.
And what precisely does Job 2:1 has to do what is recorded in Job 5:1 or Psalms? This isn't a pattern throughout the Bible. What is being ignored is that God calls believers, faithful or holy.
You're throwing out other words that has nothing to do with the term "saint" or "saints". I can't help it if the Church failed to read the scriptures before they decided on their classification of the term "saint".