Odin
From Tardis Wiki, the free Doctor Who reference
Odin was, in Viking mythology, the father of the gods. (TV: The Girl Who Died)
The Third Doctor and Jo Grant met Odin in 141. He was actually a human High King of all Sweden, who was supposed a god due to the power of Gungnir or Spear of Destiny, an alien artifact he possessed. (PROSE: The Spear of Destiny)
When the Twelfth Doctor was captured by Vikings, he attempted to impersonate Odin. At that moment, the leader of the Mire appeared in the sky also pretending to be Odin. (TV: The Girl Who Died)
