The Son of God--who took on flesh and walked this earth as Jesus, the Christ--is older than all the other 'faith leaders' and "religious founders."
So if 'he came first' is one's gauge for authenticity and/or veracity:
"In the beginning was the Word, and the Word was with God, and the Word was God. He was in the beginning with God. All things were made through him, and without him was not any thing made that was made. In him was life, and the life was the light of men. The light shines in the darkness, and the darkness has not overcome it."
...
"And the Word became flesh and dwelt among us, and we have seen his glory, glory as of the only Son from the Father, full of grace and truth. For from his fullness we have all received, grace upon grace. For the law was given through Moses; grace and truth came through Jesus Christ. No one has ever seen God; God the only Son, who is at the Father’s side, he has made him known."
John 1:1-5, 14, 16-18, ESV
https://www.esv.org/John+1/