Vader held the rank of Supreme Commander of the Imperial Forces. While Palpatine, as Emperor, had complete control of the military, Supreme Commanders oversaw the military directly, and were outranked only by Palpatine. This title was also held by Thrawn at one point.
Vader, the only power who overrules him is papa Palpatine.
Darth Vader beat the Emperor in the end, using one of his own tactics which he witnessed for the first time decades before, with Mace Windu. Darth Sidious was always stronger than Vader, which is why he ruled over him for almost 20 years and turned him into the Sith Lord he was.
It's a very common misconception. Darth Vader's “official” position was that of Imperial Enforcer. In terms of rank, practically everyone outranked him. However, his position came with a number of perks that allowed him to operate both within and outside of the Empire's regulations or militaristic chain of command.
Vader was outside the Imperial Chain of Command and reported directly to Emperor Palpatine. However, as he was bound to do his Master's bidding, and sometimes screwed up, Palpatine would occasionally have Darth Vader serve others, which reinforced Vader's feelings of inferiority towards his Master, humiliated him, etc.
Tarkin technically outranks Vader while within Oversector Outer, Tarkin's jurisdiction. The only caveat is that Vader could and would hold authority over Tarkin when acting within his role as the “Emperor's Emissary” ie when he is acting on the Emperor's behalf.
In canon, there are only two characters more powerful than Darth Vader: Luke and Yoda. In Legends, there are too many to count.
This might be a bit of a controversial pick at just number three, but Darth Vader, perhaps the best-known Dark Side user, is not the most powerful Sith ever. Born Anakin Skywalker, Vader became an extremely powerful Jedi Knight, one who was prophesized to be the "Chosen One" who would bring balance to the Force.
An intimidating mix of machine and man, Admiral Karius serves as Darth Vader's second-in-command on Mustafar. Stern and unforgiving, he intends to see to it personally that the captain of the Windfall doesn't survive their stay at Fortress Vader.
Infil'a put up a fierce fight against Vader, almost killing him by throwing the already damaged Sith Lord off of a cliff. Despite severe damage to his suit, Vader survived the fall, and repaired himself with parts from Infil'a's droid, Arex.
We would have to give the victory to Darth Vader. While the two dark lords seem perfectly matched on their villainy and power, Darth Vader's lightsaber and ability to immediately use the force to choke Voldemort, without chanting any spell would end this showdown in seconds.
Yoda will most likely win in a fight against Darth Vader because he is more skilled with a lightsaber and has the experience and feats that allow him to trim whatever size and strength advantage Darth Vader has over him. In fact, Yoda nearly defeated Palpatine, something that Vader could never do.
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. After receiving his knighthood, Skywalker oversaw the Jedi training of his own apprentice, Ahsoka Tano.
Throughout the sequel trilogy, Kylo Ren serves as the master of the Knights of Ren, a warlord of the First Order, and both an adversary of and romantic interest for Rey.
The highest rank in the Imperial Military was Military Executor/Supreme Commander, Grand General in the Imperial Army, and Grand Admiral in the Imperial Navy. Malcor Brashin was a notable Imperial Grand General and Mitth'raw'nuruodo (Thrawn), Gilad Pellaeon and Morlish Veed are examples of famous Grand Admirals.
A Darth is second only to the Emperor and are able to train as many apprentices as they see fit.
The mighty flagship of Darth Vader, the Executor led Death Squadron during the Empire's assault on Hoth and pursued the Millennium Falcon to Bespin, where Luke Skywalker and his friends narrowly escaped her tractor beams.
History. During the Battle of Endor, Luke Skywalker severed Vader's hand with his lightsaber, and the cybernetic appendage was lost down a shaft in the Emperor's throne room aboard the Death Star.
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.
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 Vader Kills Starkiller (Star Wars The Force Unleashed) - YouTube.
Against the entire Rebel Alliance, Palpatine stands above them all as a force of pure wickedness and hostility. However, Vader has potentially even stronger Force powers than Palpatine, as seen by his manipulation of an even stronger, mightier Force Lightning.