Servant has a broad meaning, referring to Messiah in some Scriptures, but also to common servants, public servants, and ministers who serve the LORD*.

Isaiah 57:10. You wearied in the greatness of your way, yet did not speak, There is no hope. You have found the life of your hand, therefore you were not grieved. 11. And of whom have you been afraid or been awed, so you lied and have not remembered Me, nor laid it to your heart?! Have I not held My peace even of old and you have not revered Me?! 12. I shall declare your acts of loving kindness and your deeds, for they will not profit you. 13. When you cry, let your companies of idols deliver you, but the wind will carry them all away. Vanity will take them, but he who puts his trust in Me will possess the land and will inherit My holy mountain.