I agree with you. "The Lord continued to appear ar Shiloh, and there he revealed himself to Samuel through his word."
I can see case for Moses, Abraham, Enoch, and others, because the Bible does use the term "prophet" or "prophesied" in reference to them.
In reference to Abraham:
Genesis 20:7 - Now therefore restore the man his wife; for he is a
prophet, and he shall pray for thee, and thou shalt live: and if thou restore her not, know thou that thou shalt surely die, thou, and all that are thine.
In reference to Moses:
Deuteronomy 34:10 - And there arose not a
prophet since in Israel like unto Moses, whom the LORD knew face to face...
In reference to Enoch:
Jude vs. 14,15 - And Enoch also, the seventh from Adam, prophesied of these, saying, Behold, the Lord cometh with ten thousands of his saints, 15To execute judgment upon all, and to convince all that are ungodly among them of all their ungodly deeds which they have ungodly committed, and of all their hard speeches which ungodly sinners have spoken against him.
However, in the actual functional OFFICE according to the classical, traditional, historical definition of "prophet", Samuel gets that distinction of being the first. In fact, if you look at I Samuel 9:9, you see how the term "prophet" did not exist
per se before him, the way we know it.
(Beforetime in Israel, when a man went to enquire of God, thus he spake, Come, and let us go to the seer: for he that is now called a Prophet was beforetime called a Seer.)
I Samuel 9:9
