Joshua leads the people into the promised inheritance, and his name in Hebrew is the same name as Jesus.
Boaz redeems a widow named Ruth at his own cost, publicly, legally, willingly, and becomes the pattern for every kinsman-redeemer who comes after him.
David is a shepherd before he is ever a king, and Jesus calls Himself the Good Shepherd who lays down His life for the sheep. Solomon reigns over a kingdom of unprecedented peace, and every prophet after him describes a coming King whose peace will never end.
Psalm 22 describes a death by piercing in language written a full thousand years before crucifixion existed anywhere as a method of execution. Psalm 110 has God speaking to someone David calls his Lord, sit at my right hand, a verse Jesus Himself will later use to silence the Pharisees completely.
Proverbs 8 personifies wisdom as present at creation itself, beside God before the world existed. Song of Solomon sings of a bridegroom pursuing his bride with a love that will not quit, and Scripture will later call the church the bride of Christ and Jesus the Bridegroom who is coming for her.
Isaiah alone hands you a virgin birth, a servant who carries what was never His to carry, and a coming light for the nations. Micah names His birthplace five hundred years early. Jeremiah promises a new covenant written on the heart instead of stone. Ezekiel describes one true Shepherd who will finally gather the scattered sheep.
Daniel's seventh chapter sees one like a son of man given dominion and glory and a kingdom that will never be destroyed. Zechariah describes a king entering Jerusalem on a donkey, humble, riding to His own city. Malachi closes the Old Testament promising a messenger to prepare the way and the sun of righteousness rising with healing in His wings.
Every sacrifice, every feast, every prophet, every priest, every king, every single promise in thirty-nine books, all of it, pointed at one Person, and He had not even arrived yet.