Who walked with God and then "was no more, because God had taken him away"?

Answer: Enoch

Enoch walked with God and then was no more. Hebrews 11:5 adds that he was taken up so that he did not see death.

“Enoch walked with God, and then he was no more, because God had taken him away. By faith Enoch was taken up so that he did not see death: “He could not be found, because God had taken him away.” For before he was taken, he was commended as one who pleased God.”— Genesis 5:24; Hebrews 11:5 (BSB)