All 36 Sith Lords In Star Wars Canon

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Star Wars canon has confirmed the existence of a staggering 36 Sith Lords to date, with many drawn from the Expanded Universe. The heroes of Star Wars have long since learned not to underestimate the power of the dark side, something that will likely be explored in upcoming Star Wars TV shows like The Acolyte. The greatest villains of the galaxy - the Sith Lords - use the dark side of the Force to wreak havoc on a galactic scale. The dark side Force powers wielded by the Sith make them a threat to even the most skilled Jedi of the Council.
Thomas Bacon

https://screenrant.com/star-wars-all-sith-lords-canon/