Who anointed Jesus? Who chose him? Who sent him?
The prophet Samuel anointed both King Saul and King David. He used oil, [probably olive oil] and touched it to or poured it on their heads. But that was an OT anointing where many times it was a physical ritual typifying the spiritual anointing to come. Both of them as we read in the scriptures were anointed also by the Spirit... effectively become new men. Saul alone of the two lost his anointing due to his repeated selfish disobedience...
"But the spirit of the LORD departed from Saul, and an evil spirit from the LORD troubled him." I Sam 16:14
Then here we see Jesus being anointed directly as the Spirit of God lights upon him:
"And Jesus, when he was baptized, went up straightway out of the water: and, lo, the heavens were opened unto him, and he saw the Spirit of God descending like a dove, and lighting upon him:
And lo a voice from heaven, saying, This is my beloved Son, in whom I am well pleased." Matt 3:16-17
And then here:
"The Spirit of the Lord is upon me, because he hath anointed me to preach the gospel to the poor; he hath sent me to heal the brokenhearted, to preach deliverance to the captives, and recovering of sight to the blind, to set at liberty them that are bruised,
To preach the acceptable year of the Lord." Luke 4:18-19
So then who is the He that anointed and sent Jesus?
"I can of mine own self do nothing: as I hear, I judge: and my judgment is just; because I seek not mine own will, but the will of the Father which hath sent me" John 5:30