Anakin Skywalker, a Force-sensitive human male, was a Jedi Knight of the Galactic Republic, a hero of the Clone Wars and the Chosen One of the Jedi Order. During the reign of the Galactic Empire, he was known as Darth Vader, Sith Lord and apprentice to Emperor Darth Sidious.
The sorcery that Freedon Nadd practiced later served as the means through which another Sith Lord learned to manipulate the dark side of the Force. Following the end of the New Sith Wars in 1000 BBY, Nadd's tomb was visited by Darth Bane, the last living Dark Lord of the Sith in the galaxy.
Marka Ragnos was a male half-breed Dark Lord of the Sith who lived during the time of the first Sith Empire, born long before 5100 BBY, and, around that same year, dueled Sith Lord Simus for the title of Dark Lord of the Sith and control of the Sith Empire.
Revan—renowned as the Revanchist, honored as the Revan, reviled as Revan the Butcher, dreaded as the Dark Lord of the Sith Darth Revan, and praised as the Prodigal Knight—was a Human male who played pivotal roles as both Jedi and Sith in the Mandalorian Wars, Jedi Civil War, and Great Galactic War.