Board Thread:Lore Discussion/@comment-30529651-20161117203555/@comment-35930611-20180716210823

Miraak was a Dovahkiin and also a Dragon priest As a Dragon preist he was given lots of power by the Dov and was immortal He also gained many powers from Hermaeus Mora. When he betrayed all of his Dov brothers he probably killed a decent amount of them absorbing their knowledge and power in the process.

Faal Dovahkiin the last dragonborn is by far the most powerful Dovahkiin that has ever existed. He defeated Alduin the world eater and Miraak all in one single year.

Miraak and The Last Dragonborn are the only two Dragonborns that have ever actually achieved great power and became immortal

Every other Dragonborn that has ever existed has only lived a joor mortal life as an Emperor wasting away on a throne and dying of old age never gaining or absorbing any power and knowledge from any dragons and never Achieving immense magical power becoming immortal.

Talos however did supposedly become a god after he died though but he still died of old age as an Emperor so it doesn't really count