Aaaaaalllll, let’s go! Well only main games and eso lol
Arena: Jagar Tharn, why? First bad guy, gotta respect. Also never played it
Daggerfall: Mannimarco, I just like Mannimarco! Also haven’t played it.
Morrowind: Vivec but haven’t played it.
Oblivion: Sheogorath! Absolutely the funniest character and gets a whole dlc about him, like he damn deserves.
Skyrim: Sheogorath! Return of the King!…Prince…God… and the return of a protagonist!
ESO: a tie between Razum Dar and Naryu