Overlord by Kugane Maruyama is a light novel series that has both anime and manga adaptations. Yes, I do have at least one work prepared for the new category.
If the character Ainz Ooal Gown/Momonga cannot be listed as such, for clarification, he is the same character, but he changed his own name in the first novel for reasons. His human self is Suzuki Satoru (given name, family name) and his character is Momonga who later changes his name to Ainz Ooal Gown. Please list whichever you think is appropriate. He does spend most of the series as Ainz Ooal Gown, or Ainz for short, if that helps.
Name of Title: Overlord
Ainz Ooal Gown/Momonga