That said, Vitiate, sometimes better known as the Sith Emperor, is often thought to have been stronger than Darth Sidious thanks to his mastery of the Dark Side of the force which granted him a ridiculously long life.
As such, if Anakin was powerful enough to shift the galaxy's power scale in Palpatine's favor, he was powerful to pose a threat to Palpatine. Darth Vader did not have the spirit to challenge Palpatine, at least in the current canon, but a hypothetical prime Anakin Skywalker could defeat Darth Sidious.
This article is about the Sith Lord. You may be looking for the Legends novel Darth Plagueis. Darth Plagueis (pronounced /'pleɪɡ.əs/) was a Force-sensitive male Muun Dark Lord of the Sith and the Sith Master of Darth Sidious.
Having covertly turned Kylo Ren—Anakin's grandson and Luke's nephew—to the dark side, Palpatine orders Ren to find and kill Rey, the last remaining Jedi and Palpatine's paternal granddaughter. Palpatine is ultimately defeated and destroyed by Rey.
In canon there is no sith lord stronger than palpatine… In legends though… probably almost every notable sith lord from the old republic era.
1. Darth Sidious (Star Wars: Episode I – The Phantom Menace) Truly, the most powerful Sith Lord was Darth Sidious, better known in his public persona of Chancellor (later Emperor) Palpatine. Through cunning and manipulation, Sidious killed his master to claim the mantle of Dark Lord of the Sith.
Yoda was tempted by the dark side on a few occasions throughout his life. If he fell to the Sith ways, he would've been more powerful than Palpatine.
Palpatine admits to Darth Vader that the Jedi he actually feared most was none other than Jocasta Nu.
Stating that Palpatine was just too dangerous to be left alive, Windu prepared to kill him, while Skywalker desperately claimed that doing so was not the Jedi way and finally blurting out "I need him!" When Windu tried to make the killing blow, Skywalker lashed out at him, severing his lightsaber-holding hand and ...
As the first Dark Lord of the Sith, Ajunta Pall founded the first Sith Empire and expanded it onto other worlds. The Sith took over the planet Ziost and created it as their capital and as Pall's new home.
Padawan Windu was trained in the ways of the Force by Jedi Master Cyslin Myr.
Within the Star Wars Legends continuity, Yoda's Jedi instructor was N'Kata Del Gormo, a Hysalrian Jedi Master, according to an in-universe legend.
Darth Sidious was able to cheat his upcoming death by transferring his spirit into a clone body while falling into the reactor core of the second Death Star. He later sought to prolong his existence by futilely manipulating his grandchild Rey into killing him so he could live further by possessing her body.
If Obi-Wan had fought Sidious, he would have died. That has been well established, but I think Yoda was more concerned with the fact that Obi-Wan needed to face Anakin. Yoda wasn't sure if he could even beat Sidious, but he knew he could keep Sidious distracted from their fight.
While Yoda holds his own in both of these fights, he doesn't win any of them. We never see the greatest of Jedi win a fight. They both end in draws. It makes sense that he'd battle to a draw with Darth Sidious, but he should've easily been able to handle his old apprentice Count Dooku.
Mace Windu failed in his mission to arrest Palpatine in Star Wars: Episode III - Revenge of the Sith, but Yoda may well have fared better. As powerful as Darth Sidious may have been, it's easy to forget he actually seemed afraid of Master Yoda.
again… One of the main reasons why Yoda would've won against Anakin is simply because he was far better trained than him. Yoda could see the moves his opponents were going to make before they made them; therefore, battling against Anakin would've put him at a far heavier advantage.
This ensured that the Sith could hone their skills in secret without fear of betrayal from rival Sith factions. More cunning and devious than all but the most attuned Force-sensitive beings, Darth Bane could more than likely defeat Yoda in a battle of both strength and wit.
In non-canon material it is said that Palpatine had a number of concubines and never took a wife in fear that he would produce a legitimate heir. One of these non-canon concubines was Roganda Ismaren, a former Jedi who survived Order 66, and lived for a time at Palpatine's side.
Even after his brutal scorching in the fires of Mustafar, sand remained the only natural phenomenon that Vader feared. To him, sand was a reminder that he'd failed to save his mother or Padme from death.
Master Yoda failed Anakin Skywalker in Star Wars: Episode II — Attack of the Clones, and it resulted in the destruction of the Jedi Order. Master Yoda is one of the most revered characters in the Star Wars universe, and for good reason, but he ultimately failed in stopping the rise of the Sith.
It's already well-established that Qui-Gon was incredibly strong with the Force. He continuously studied the ways of the Force and eventually learned enough about the Cosmic Force and the Living Force to unlock the secrets of eternal life.
That was until Master Plo Koon showed up though, and actually managed to defeat Yoda without even using his Electric Judgement ability. Yoda was impressed with Master Plo and gave him great respect from that moment onwards. You can only imagine the reaction of the Padawans watching the fight!