I would never say God lies, hopefully, neither would you, although you seem to feel strongly that where God speaks literally, He speaks only figuratively.
God speaks literally but, what you do not understand is the means He has chosen to speak to His servants the Prophets; by way of a dream or vision if you read Numbers 12:6 or through His Word in the Tanach.
I would say rather that you misunderstand God's Word. I'm comfortable saying that since your declaration, "No one will ever return from the grave" directly contradicts this passage in Tanakh, at the end of the book of Daniel:
My declaration! I have never declared here from the top of my head that no one will ever return from the grave. I simply mention what is written in the Word of God. (II Samuel 12:23; Psalm 49:12,20; Isaiah 26:14; Job 7:9; etc.)
. . . And at that time your people shall be delivered, Every one who is found written in the book. 2 And many of those who sleep in the dust of the earth shall awake, Some to everlasting life, Some to shame and everlasting contempt. 3 Those who are wise shall shine Like the brightness of the firmament, And those who turn many to righteousness Like the stars forever and ever.
To understand that text of Daniel, you must first understand Isaiah 53:8,9. When Jews are forced into exile, it is as if they have been cut off from the Land of the living and graves are assigned to them among the nations. At the end of the exile, the Lord opens those graves and brings them back to the Land of Israel; as for instance the Dry Bones of Ezekiel 37:12. Jews in exile. Since not all of them are found written in the book to return to Israel at the end of the exile aka to make Aliyah, those who shall awake by making Aliyah are analogically compared to everlasting life and those who prefer to stay in exile to everlasting contempt. So, words like everlasting life or forever and ever like the stars are those who return or turn many to righteousness.
I can show you other passages in Tanakh if you like as well. I'm familiar also with the passages you're thinking of, if that helps, where from the perspective of the living, the dead are unreachable--and indeed, are forbidden to be contacted, as per the Tanakh prohibitions against mediums (as in the Saul and the Witch of Endor story and in Deuteronomy 18).
Be my guest! I am more than happy to learn of other passages in the Tanach that I might have missed.
However, Ben, our living perspective is not God's perspective. Which is why we need the illumination of Tanakh and also, the B'rit Chadashah.
I need the gospel of Jesus which was the Tanach and you need the gospel of Paul which was the NT. Both together serve only to contradict each other.