Darth Plageuis is one of the most famous Sith Lords in the Star Wars Universe. Plageuis was the mentor and master to Darth Sidious, and he was spoken of to Anakin in Star Wars: Revenge of the Sith.
Star Wars fans adore Darth Nihilus, and for good reason. His skeletal-like mask and dark robe make for an iconic Sith, yet it's his brutality, ruthlessness, and immense power that make Nihilus a fan favorite.
1. Darth Sidious. Born in 82 BBY on Naboo as Sheev Palpatine, Darth Sidious had a strong connection to the Force and was trained by Darth Plagueis in the ways of the Sith – enroute to becoming one of the most powerful Force users in history.
Darth Sidious, also known as the Emperor and Supreme Chancellor Palpatine, is not just the evilest Sith in Star Wars (arguably in both canon and Legends) but the evilest villain overall, deemed so thanks to his irredeemable actions throughout the Skywalker saga and surrounding content.
The obvious answer is Darth Vectivus, a Sith Lord who lived in his house and didn't try to conquer the galaxy or destroy the Jedi. And while he wasn't evil, he wasn't good, either. However, there is one good Sith. Darth Tenebrous was a Legends Bith Sith Lord who, like most Bith, was fascinated with computers.
Darth Plagueis. Darth Plagueis studied the Force like a scientist. He was a philosopher and a extremely wealthy banker as well.
killed by an Imperial strike team, his dark side, like many Seth before him, refused to let go of life.
As impressive as Vader's battle tactics might be, if he and Revan make a stand with comparable armies, Revan is likely to be victorious. So, this point goes to Revan as well.
But the record Sith-killer is actually Darth Bane himself. Darth Bane, founder of the Rule of Two, killed more Sith than any Jedi in the history of the Star Wars galaxy.
Ajunta Pall carries the dark honor of being the first Sith Lord to ever exist in the Star Wars universe.
According to Star Wars Legends content, the first Sith was a former Jedi Master, Ajunta Pall, who became a so-called Dark Jedi, or “Fallen” Jedi. As the name implies, these Force-sensitives chose to practice the Dark Side, and rejected the Light Side of the Force.
Galen was secretly trained as a Sith Lord apprentice to Vader, but returned to the light side and the Jedi. Galen Marek is the only one who came close to destroying the Sith Lord, thanks to his vast knowledge of Vader's fighting tactics through the many hours they trained together.
By far the most iconic Sith Lord and warrior is Darth Vader (or Anakin Skywalker). He, through his extensive injuries and being trapped in a technologically-advanced suit to survive, stayed strong with the force.
The most iconic Sith duo is that of Darth Sidious and Darth Vader. When it comes to the films, the immense power of their strengths combined remains to be seen.
Affiliation(s) Adas was king of Korriban and the Sith in a reign that lasted nearly three hundred years. He was large for his species, his skin was unusually charcoal-colored, and he was raised as a chosen being from his youth.
Kenobi definitively beating Vader in a fight and choosing to walk away and let him live may have broken something in Anakin, forcing him to turn his focus away from the past and on to the future.
He would go through many twists and turns in his life but it would be defined by his time as a feared Sith Lord. Revan is another Sith who is easily Ren's superior in just about every way. He was an extremely successful combatant and general.
Alongside Alek, the man achieved the rank of Jedi Knight sometime before the year 3964 BBY, and the two were widely acknowledged as being among the most promising members of the Jedi Order.
Darth Malak betrays Darth Revan and becomes Dark Lord of the Sith. Force bond forged between Revan and Bastila Shan.
Revan has incredible will, which was what allowed him to endure centuries of torture from Vitiate, though he was not unscarred. His mind started to become twisted between the light and dark sides and after his light side left him, Revan was completely fueled by anger and hate.
1 Darth Vitiate
Hands down the greatest Sith of all time, Darth Vitiate was one of the galaxies most feared and dangerous threats. His power was so great that he himself was a danger to every living thing that surrounded him.
DARTH SION : THE IMMORTAL SITH LORD WHO MASTERED PAIN AND DEATH Star Wars Theory. DARK SIDE FRIDAY - Darth Sion is definitely one of the most powerful Sith Lords. Sion's deep pain and rage channeled the Dark Side allowing him to cheat death.
Not to mention, Palpatine was smart enough to figure out how to destroy the Jedi and the republic in one fell swoop. Sidious' IQ therefore is most definitely in the top 0.1% at least. His IQ I would say is +160, but there is no real way to know for sure.
1 Grand Admiral Thrawn, the ultimate strategist.