Darth Plagueis The Wise is the most powerful force-user. He was so powerful that he could create and even drain life from others. Plus he could overload another force-user's midichlorians with life-force to kill said force-user.
Master Yoda has risen above all others to claim the top spot as the most powerful Jedi of all time and the true chosen one according to IGN's audience. He won pretty handily as well, as he was victorious in 89,756 of his 95,243 battles and had a win percentage of 94.2%.
Prior to his defeat on Mustafar, Anakin Skywalker was the single most powerful Force user in the known galaxy. In a direct brute Force contest, Anakin Skywalker would sweep the floor with anyone. The ability to use the Force is a powerful edge against any foe, but it isn't everything.
In Star Wars Legends and Canon, Galen Marek (Starkiller) is the only Jedi (other than Obi-Wan Kenobi) to put a beat down on Darth Vader/Anakin Skywalker.
In the Star Wars: The Force Unleashed video game, Darth Vader dispatches Starkiller to kill a number of Jedi who have survived the Great Jedi Purge. Starkiller is initially kept in secret, but he is discovered by Emperor Palpatine, he is seemingly betrayed and killed by Vader.
A Sith in all but name, Starkiller spent years honing his skills in lightsaber combat and Force techniques as Vader's secret apprentice and personal assassin.
Biography. Legend had it that Yoda—a Jedi who became Grand Master—was trained by N'Kata Del Gormo.
Aside from agility and telekinesis, Yoda could absorb and redirect Force attacks, like lightning. Because of his higher understanding, he would easily overcome Darth Vader in a fight, though that doesn't mean it wouldn't be a difficult battle.
During the early days of the Clone Wars, Skywalker served as a Jedi General in the Grand Army of the Republic, commanding the clone troopers of the elite 501st Legion against the Confederacy of Independent Systems.
1 Darth Sidious
There has been no Sith, as powerful, meticulous, nor as evil as the Emperor himself, Darth Sidious. As previously mentioned, Sidious trained in the Dark Side by Darth Plagueis before Sidious killed Plagueis in his sleep, making Sidious a Sith Master.
Yoda. Yoda was a wise, experienced, and powerful Grand Master of the Jedi of an unknown species and the oldest known prophet in existence (having lived at least 900 years), considered the wisest and most powerful Jedi Master within the Star Wars universe.
If we're to come to a definitive decision on who the strongest Jedi ever is then we have to consider more than their physical skills and strength. Master Windu could be the strongest Jedi ever, he's strong, trained, wise and proved his abilities in combat as well on the Jedi council.
The highest known midi-chlorian count—over 20,000 per cell—belonged to the Jedi Anakin Skywalker, who was believed to have been conceived by the midi-chlorians.
Anakin Skywalker is the son of Shmi Skywalker, born without a father through the Force. He is the secret husband of Padmé Amidala, the father of Luke Skywalker and Leia Organa, the father-in-law of Han Solo, and the maternal grandfather of Ben Solo.
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.
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.
Jaina became the foremost Sith killer not named Luke Skywalker, killing her brother Darth Caedus and many members of the Lost Tribe of the Sith during their attack on Coruscant. Vader was formidable but Jaina would be able to overcome him.
The very first Jedi in Star Wars canon is a nameless figure known as the Prime Jedi. He was likely the builder of the first Jedi Temple on Ahch-To, seen in The Last Jedi. According to the Star Wars: The Last Jedi: The Visual Dictionary, the mosaic of stones in the chamber of the Temple depicts the Prime Jedi.
Though he saw Anakin's potential, Yoda could not ignore the danger inherent in Anakin's unrestrained emotional attachments. To teach Anakin responsibility, Yoda assigned Skywalker a Padawan learner: Ahsoka Tano. Yoda knew there would come a time when Anakin had to let go of Ahsoka.
A Sith Lord with the ability to prevent death and create life, Plagueis is the mentor of Sheev Palpatine/Darth Sidious, who, in accordance to the Sith's Rule of Two, eventually betrays Plagueis by murdering him in his sleep, taking his place as Sith Master.
The dark clone of Anakin Skywalker, who later take on both of the names of his genetic template, first Anakin Skywalker, and later on Darth Vader, was a human male cloned by Starkiller from the genetic material of his former master, Darth Vader.
Subject 1138, also known as "Starkiller," was a clone of Galen Marek, a Force-sensitive Human male trained by the Sith Lord Darth Vader as his secret apprentice.
Darth Starkiller, formerly Galen Marek, was a Human male Sith Lord who served under the Galactic Empire and Emperor Palpatine.