The Mule of Isaac Asimov's Foundation series somehow finds himself teleported into Middle Earth at the beginning of the Third Era.
Sauron and his ring is nowhere to be found, but the power vacuum has left an opening for a new Dark Lord to arise, and so he begins amassing power and gathering an army. Maiar such as Saruman and Gandalf are present on the planet.
Can the super-strong super genius with psychic empathic powers take over Middle Earth and dominate it the way Sauron intended, if no Valar intervention is allowed?