What's Anakin/Darth Vader's fear? When he was Anakin, he feared losing the people closest to him, whether it was by distance or death. He did end up losing pretty much everyone close to him, namely Qui-Gon, his mother Shmi, then lastly Padme. It was his fear of never ending loss that drove him to become Vader.
This information comes to light form the comic series Darth Vader: Dark Lord of the Sith by Charles Soule and Giuseppe Camuncoli, in particular issue #7. Palpatine admits to Darth Vader that the Jedi he actually feared most was none other than Jocasta Nu.
1/15 Luke Skywalker
Having faced his father once before, Luke was familiar with his tactics and used the force to gain an upper-hand. In Star Wars Canon, only Luke Skywalker can be acknowledged as the one who truly defeated Darth Vader.
It appeared that Darth Vader was more machine than we thought. His armor could be hacked and controlled by a device. In a turn of events, Darth Vader's right limb holding his dangerous scarlet lightsaber was moving of its own accord toward his neck. This was a dangerous weakness indeed.
Between Darth Vader and Obi-Wan, it's pretty clear that Vader is far more powerful with the force. After all, he pretty easily used the force to stop a starship from taking off in the previous episode, and manhandled Kenobi throughout the majority of the show.
Since he was that little boy, Anakin has feared the “death” dragon. The dragon inside of him that reminds him that stars burn out, that people will die, that all things die. This is the kind of fear that lives inside Anakin Skywalker: the dragon of that dead star.
Vader held respect for Tarkin which is clearly shown and the only case in which Tarkin outranked Vader would be the case in which Vader was in the Death Star or within Tarkin's Oversector which he likely was as Tarkin was Grand Moff of the Outer Rim Oversector, the largest one.
Darth Sidious
In the end, Vader managed to fulfill the prophecy tied to him. As for Darth Sidious, he's by far the most dangerous enemy Vader has had. Becoming emperor of the galaxy and crushing most of the Jedi was proof enough.
Did Darth Vader ever lost a fight? Darth Vader is one of the greatest villains of all time. But even he gets beaten sometimes. CBR lists all of the folks who managed this improbable feat!
The ever stronger fear
In the Phantom Menace, Master Yoda senses much fear in Anakin, however, this fear is not the understandable anxiety - Anakin is afraid to lose his mother, Shmi, whom he was forced to leave behind in slavery.
Obi-Wan Could've Beaten Vader in Star Wars: A New Hope - If He Wanted To. While Obi-Wan Kenobi was frail by the time of Star Wars: A New Hope, he was still stronger with the Force than Vader.
DARK SIDE FRIDAY - Did you know Palpatine feared Qui-Gon Jinn? Palpatine was immensely powerful and he could see the future which made him very confident about pretty much anyone who stood against him.
Vader Force chokes Motti for his lack of faith. By 0 BBY, Motti served as Admiral of the Navy, and held the position of Chief of the Imperial Navy.
Admiral Ozzel's legacy is that Darth Vader Force-choked him to death before the Battle of Hoth in The Empire Strikes Back. As commander of Darth Vader's flagship the Executor, Ozzel was one of the first to learn that an Imperial probe droid had been destroyed on Hoth.
Admiral Ozzel : [appearing onscreen with Captain Piett] Lord Vader, the fleet has moved out of lightspeed and we're preparing to... Darth Vader : You have failed me for the last time, Admiral! Captain Piett?
Erv Lekauf was a lieutenant in the Imperial Army who served as Darth Vader's personal aide for several years. On a mission to Vohai in 19 BBY, Lekauf helped Vader fight the Emperor's Hand Sa Cuis, impressing the Dark Lord with his courage and loyalty.
Darth Vader defeats Darth Maul. The two Sith Lords engaged in a lightsaber duel, going through the volcano and onto a bridge situated over a river of lava, which collapsed, though they both survived and continued their battle.
In the original trilogy, Palpatine is depicted as the Emperor of the Galactic Empire and the master of Darth Vader.
An ambitious Imperial officer, Piett rose through the ranks to captain and was assigned to the Super Star Destroyer Executor, Darth Vader's flagship.
Sidious eventually betrayed Tyranus by ordering Anakin Skywalker to kill him. Tyranus was then replaced by Skywalker, who pledged fealty to his new Sith Master as Darth Vader. Like his predecessor, Vader was an apprentice who mentored Force-sensitive students despite not holding the rank of Sith Master.
89-90). Thus Othellos actions directly lead to his downfall. In Revenge of the Sith, Anakin is also responsible for his own downfall. His pride and anger cause him to kill his superior and betray everything he has sworn to protect.
Luke confronts his fear in the cave on Dagobah, as he comes to see that which he fears the most: what he might become. But by Return of the Jedi, when he stands before Palpatine and throws his lightsaber away, insisting, “I am a Jedi, like my father before me,” he has faced and confronted this fear.
Anakin Skywalker, one of the main characters in the "Star Wars" films, meets the criteria for borderline personality disorder (BPD).