Well..........
Adam <----slap him and ask him what was he thinking
Jokes HAH
Moses <---Ask him what it felt like to be empowered and saturated with the power of God when allowed to see God's backside
Joshua <---ask him what was it like when the Sun and Moon stood still in the midst of heaven
Daniel <---ask him to fully explain ALL of his prophecies (end all the controversies)
John <---ask him for a full, complete overview of his view of Revelation (end all the controversies)