As Darth Vader, Skywalker was believed to have had roughly eight-tenths of the strength of the Emperor. Nevertheless, Vader wielded tremendous power and skill, enough to use the Force to overpower almost any opponent he could not defeat with his lightsaber.
Anakin was a physical powerhouse, able to hammer Tyranus, and push back Kenobi all over the place with raw strength and sheer power. Why did Obi-Wan feel that he failed Anakin when the younger Jedi had been manipulated by Palpatine secretly for decades?
While we never got to see Yoda vs. Darth Vader, it surely would have been a sight to behold. Had Yoda and Darth Vader fought each other both at full power, the fight arguably would have landed in Yoda's favor. Both are proficient with a lightsaber and with the Force, but Yoda might just be a little bit better.
Darth Vader Reveals How His Suit TRULY FEELS [Worse Than You Think!]
What Jedi could beat Vader?
While Vader had his weaknesses, including vulnerability to electricity, characters like Emperor Palpatine, Mace Windu, Yoda, and Obi-Wan Kenobi all had the potential to defeat him in battle.
He can't use the Force against Thanos' mind, and he definitely won't prevail in a fight in the Marvel Universe if Thanos has the Infinity Gauntlet, but the Force will provide Darth Vader safe insurance. In the end, Thanos' neck is only as strong as his skin.
As further highlighted by Vader and Kylo's redemption stories, it was a lesson that Kylo Ren never fully learned himself, which makes Darth Vader the more powerful user of the Force between the two of them in Star Wars.
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.
The realistic answer seems to be, yes, Anakin in his prime could have defeated Luke Skywalker (in the current canon) if they battled one-on-one. The main reason behind this is Luke's lack of formal Jedi training, at least when it comes to combat.
Anakin would have only grown more and more powerful if he wasn't held back by his suit, and this very likely would have been him an unbeatable force. He was so young when Mustafar happened, and his near-death experience aged him greatly.
Sidious then confirms that Anakin is 'far' more powerful. Anakin's quick work of Dooku + Sheev's confirmation immediately make it clear that Anakin is a tier above Dooku power wise when he cuts loose.
Jedi are always training their bodies. It's rare to come across an out of shape Jedi. Yoda did physical training with Luke Skywalker on Dagobah in the Empire Strikes Back for example. Not only are Jedi physically fit but they can also use the force to augment their physicals to various superhuman levels.
Anakin Skywalker was the Chosen One, conceived by the Force itself. According to Star Wars: Episode I - The Phantom Menace, he had a midichlorian count higher than even Master Yoda. This meant he had the potential to access the Force and achieve feats no other Jedi or Sith had ever managed.
He weighed 120 kilograms in his armor, leaving deep, tank-like tracks in the mud wherever he walked, and was 2.03 meters tall in it. The armor also featured a remote to prep Vader's interceptor for combat.
Darth Vader's love and skill for droids and mechanics, particularly from his childhood, becomes a major tactical weakness for him in Star Wars: Dark Droids #3. The Scourge targets Darth Vader and attempts to defeat him by assimilating his own droids, but their plan is foiled by outside interference.
Yoda's presence on Dagobah was likely hidden due to his mastery of Force Stealth and the planet's connection to the Force. Yoda, with his enhanced Force abilities and potential home-field advantage, would have had the upper hand against Darth Vader if they engaged in a lightsaber duel.
Darth Maul and Darth Vader never met in the Star Wars canon, although Maul and Anakin Skywalker were heavily involved in key events of the Clone Wars. That includes the Siege of Mandalore, in which Anakin would have participated had it not been for the Chancellor's kidnapping.
By the time of Episode 3; Anakin is in his prime, and already one of the Jedi Order's most powerful “masters” (although technically still a knight), just behind Obi-Wan, Windu, and Yoda. Maul wouldn't stand a chance.
Simply put, Vader has a knack for winning fights and proving his dominance throughout Star Wars. After all, he was a Jedi hunter. He lived to fight, and a battle with Rey would likely end with her quick demise.
Obi-Wan Kenobi episode 6 saw the Jedi Master defeat Darth Vader in a spectacular duel - and he accomplished this feat by breaking the same rules as Anakin Skywalker.
Many fans declare that Luke won the confrontation because he nearly killed Vader, but that's technically not true. Vader was far more powerful than Luke and easily could have bested him. So, knowing that Vader wasn't allowed to kill Luke drastically changes the equation.
The Hulk is the strongest one there is and one of the Marvel Universe's most dangerous combatants. While he's won some fights over the years that he probably shouldn't have, that wouldn't be the case against Vader. Vader is powerful, but there's not much he could do against the Hulk.
Darth Vader is powerful in the Star Wars universe, but when Star Wars meets Marvel - it's no contest. The beings in the Marvel universe are so much more powerful than Jedi that it's not even a contest. Hulk has superior speed, strength and durability.
However, there is absolutely no way he is going to defeat Galactus. As a multi-universal entity, Galactus feeds on planets. Vader ingests nutrients and liquids via tubes. In his own universe and time, Vader is the most powerful being in his galaxy, but this is little compared to Galactus.
