First and foremost, my Lord and Savior, Jesus Christ
Second, Paul - The man who once hunted down and killed Christians was chosen by God to be a witness for Him. He wrote most of the New Testament.
Third, Peter - Often chastised for his doubt, I understand how he felt. After the cock crowed 3 times, he didn't see chastisement in the eyes of Jesus, all he saw was love.
Fourth, Queen Esther - She risked it all for her people and her God
Fifth, Mary the mother of Jesus - What was it like carrying our Lord and Savior in her womb for 9 months? What was he like as a child? I am so curious and would love to talk with her.