Kenobi's average showings are probably on par with Kit Fisto/Other Council members.
But his best performances put him on par with TCW Darth Maul. And then he can match even stronger opponents than Maul by simply giving more ground in his defending. Hence him matching Sith Anakin.
So yes at his best he can match Kun if not outright beat him.
Exar's top feat is not-killing-but-also not-being-killed by Ulic, who in turn did-not-kill-but-was-also-not-killed by Sylvar.
As the latter feat is one of the greatest feats of dueling in the entire mythos, second only to Pre Viszla doing the exact same thing to Obi-Wan and Jango fist-fighting multiple lightsaber-wielding Knights to death, what we can glean from this is that Ulic and Exar are tied for the title of third greatest duelist in the mythos (right under 2nd place Pre Viszla and 1st place Jango).
Thus, Obi-Wan doesn't have a chance.
Originally posted by DARTH POWERBut his best performances put him on par with TCW Darth Maul.
👆 And Count Dooku.
Obi-Wan managed to defeat Anakin where Dooku fails.
Both Mace Windu and Dooku described Obi-Wan as ''true master of Soresu style'' in RotS, which puts him in a same skill tier with Anakin, Dooku, Windu (without amp) etc.
Why some posters here always consider Anakin vs. Dooku duel but not Obi-Wan vs. Anakin duel, some people here pretend like RotS ends up with Anakin vs. Dooku then Mustafar is never happened.
Not to mention Mace Windu said that Obi-Wan had a better chance to defeat Grievous than Anakin had. Well he didn't say directly but, he implied.
Mace had said, "so you can expect Makashi as well; given the number of Jedi he has fought and slain, you must expect that he can attack in any style, or all of them. In fact, Obi-Wan, I believe that of all living Jedi, you have the best chance to defeat him." This pronouncement had startled Obi-Wan, and he had protested. After all, the only form in which he was truly even proficient was Soresu, which was the most common lightsaber form in the Jedi Order. Founded upon the basic deflection principles all Padawans were taught-to enable them to protect themselves from blaster bolts-Soresu was very simple, and so restrained and defense-oriented that it was very nearly downright passive. "But surely, Master Windu," Obi-Wan had said, "you, with the power of Vaapad-or Yoda's mastery of Ataro-" Mace Windu had almost smiled. "I created Vaapad to answer my weakness: it channels my own darkness into a weapon of the light. Master Yoda's Ataro is also an answer to weakness: the limitations of reach and mobility imposed by his stature and his age. But for you? What weakness does Soresu answer?" Blinking, Obi-Wan had been forced to admit he'd never actually thought of it that way. "That is so like you, Master Kenobi," the Korun Master had said, shaking his head. "I am called a great swordsman because I invented a lethal style; but who is greater, the creator of a killing form-or the master of the classic form?" "I'm very flattered that you would consider me a master, but really- " "Not a master. The master," Mace had said. "Be who you are, and Grievous will never defeat you."--- RotS Novel
Then Obi-Wan says, Windu and Yoda are superior to himself,
"you, with the power of Vaapad-or Yoda's mastery of Ataro-"
but not Anakin.
Obi-Wan doesn't get a lot of credit for his performance against Obi-Wan because A) he was steadily losing, getting more tired and sloppy as the fight went on while Anakin was getting more deadly. B) It's noted that Obi-Wan knew Anakin's techniques and tricks like the back of his hand, which gave him an edge. and C) Mustafar Anakin was a step above being insane. He wasn't focused at all, and Obi-Wan was exploiting that by trolling him into making mistakes.
I think him surviving the fight was still a hell of a feat (and specifically, him stalemating Anakin "I shatter buildings just by screaming when I get mad" Skywalker in a force-duel alone proves that he's no slouch with the force, but I can see why the duel isn't notable as a metric for Obi-Wan's dueling ability.
If he had been fighting a stranger with Anakin's skill level, he would have probably died.