Nearly all the surviving Jedi Knights were hunted down and killed by Darth Vader, while Order 66 remained in effect indefinitely among the ranks of the Galactic Empire's newly christened stormtroopers. Masters Kenobi and Yoda, like many others, chose to go into exile, on Tatooine and Dagobah respectively.
Sidious quickly murdered Jedi Masters Agen Kolar, and Saesee Tiin almost immediately, while Kit Fisto was murdered only a few seconds after, but Sidious had an extended confrontation with Windu.
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%.
Jedi like Luke Skywalker and Obi-Wan Kenobi have long stood as light against the darkness. 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.
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.
But one Jedi stands above the rest and needs to start getting recognized as the greatest Jedi who ever lived. That is none other than Obi-Wan Kenobi. While this saga is ultimately the story of the Skywalkers, Obi-Wan is arguably the best and most pure Jedi to ever come out of it.
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.
The clear answer for the smartest Jedi of them all is Master Yoda. This mysterious but beloved character comes from a species about which very little is known, and has survived through many eras, stretching back to the High Republic.
Qui-Gon is fatally wounded in a lightsaber duel by the Sith Lord Darth Maul. In his final moments, he makes Obi-Wan promise that he will train the young Skywalker.
Coleman Trebor is by far the weakest Jedi to ever exist. He made his movie appearance in Attack Of The Clones. His death was shot and quick. All it took to kill him were a few well aimed blaster shots from Jango Fett.
The purpose of doing so was for him to pull Anakin to the dark side because he knew he was the Chosen One. But when Anakin refused to join the Son, the powerful Force user killed Ahsoka by draining her life energy.
Order 67 was an order requiring clone troopers to dance. During the Battle of Utapau, Darth Sidious accidentally issued Order 67 when he meant to use Order 66. Just after the order was executed, Cody and his troops began dancing. However, Sidious browsed a manual and executed Order 66.
The Kel Dor Zym, who was the Grand Master throughout the Great Galactic War, was assassinated shortly after the fall of the Jedi Temple in 3653 BBY. Sometime later, Satele Shan was elected as Grand Master, becoming the youngest known individual to ever receive the title.
Vernestra was enough of a prodigy that she eventually attained the rank of Jedi Knight at the age of only fifteen, making her the youngest Knight in a generation.
Yoda is widely revered as the wisest Jedi and stronger than most in his connection with the Force. During his incredibly long lifespan, he trained generations of Jedis, ultimately serving as the Grand Master of the Jedi Council.
Few Jedi were permitted to perform Morichro. Flow-Walking — Rare power that allows user to enter the past, alter it, and change the course of the future. Force Walk — With immense strength of will, a Sith could bind restless Sith ghosts to themselves, siphoning power.
Qui-Gon Jinn learned to manifest as a Force ghost after death, thus allowing him to retain his consciousness in the Force. Several other Jedi also achieved the same ability, most notably Obi-Wan Kenobi, Yoda and the redeemed Anakin Skywalker.
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.
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.
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.