http://starwars.wikia.com/wiki/Darth_VectivusA Legends character. A Force-sensitive Human male who was a successful business and family man. He did not pursue and become a Sith Lord until well into adulthood, but eventually became Dark Lord of the Sith. His morale and ethical standards allowed him to accumulate Sith lore and die in bed, surrounded by family and friends.
This guy's not the usual crazy-pants Sith UF usually sees. I think UF Vader would have found him interesting, respecting his knowledge and power while not understanding his lack of martial skills.