One Piece - Marshall D. Teach Blackbeard

Marshall D. Teach, commonly referred to as Blackbeard, is the captain of the Blackbeard Pirates and one of the Yonko who rule over the second half of the Grand Line, the New World. He was once a member of the Whitebeard Pirates' second division until he murdered Fourth Division commander, Thatch for the Yami Yami no Mi, and defected the crew. He briefly held the position of Shichibukai after handing Ace over to the Marines before resigning upon returning from Impel Down with prisoners from Level Six. At some point in his life, after Roger's death, Teach once fought Shanks and gave him the scars on his left eye, although the Yonko's strength at the time is unknown. After the Battle of Marineford, Blackbeard proved to the Gorosei that he had a one-step lead to usurp the empty Yonko position that Whitebeard once held, which eventually came to fruition. One of the more impressive feats he has committed was defeating two commanders of the Whitebeard Pirates; Portgas D. Ace and Thatch, when few other people would even dare touch a member of the Whitebeard Pirates for fear of incurring their captain's wrath. Ace also stated that Blackbeard could have been a commander when he was recommended for the position, indicating that his strength was equal with any of the other commanders, which is notable, as he had not yet eaten a Devil Fruit.

Blackbeard has shown himself to be an expert planner and a master at orchestrating manipulative schemes provided he has a sufficiently advanced period of time to prepare: he waited two decades aboard the "Moby Dick" with the Whitebeard Pirates and even integrated with the crew dynamic, solely to increase his opportunities of obtaining the Yami Yami no Mi (he also collected his original crew members during this timeline, indicating great charisma and leadership skills even as a regular crew mate). He also went for the capture of either Monkey D. Luffy or Portgas D. Ace in order to guarantee an offer for the vacant position of the Shichibukai by the World Government, which in turn was simply sought for the free access across the Gates of Justice into the notorious Impel Down to recruit powerful "Level Six" prisoners to strengthen his crew.

He has shown to be knowledgeable of Haki as demonstrated in Impel Down when Luffy angrily attacked him, commenting on how his spirit has improved. As of yet, it is unknown if he can use any of the three kinds of Haki. However, for all his combat prowess and intellect, Blackbeard has a ridiculous habit of conversing with his opponents too deeply, letting his guard down in the process, a defect he has demonstrated in his battles against Whitebeard, Luffy, Ace, and Magellan. This usually results in him suffering some critical injuries; in fact, if not for Shiliew's help, Teach's entire crew would have died from Magellan's Devil Fruit ability. Teach has an incredible endurance, as demonstrated when he took a point-blank quake bubble attack from Whitebeard, to his head and neck without losing consciousness, especially since his Devil Fruit causes him to receive even more damage. He has also taken a direct slash from Whitebeard's bisento without suffering any lasting damage and was able to shrug off a kick to his head from Supernova Jewelry Bonney. During his fight with Ace, he was pierced in the chest by two fire spears, but after putting out the flames, he was able to shake off the impact of the attack. Another indication of his sheer endurance is that he took a point-blank Gear Second attack from an enraged Luffy, and was hit by Sengoku in his Daibutsu form only to come out with minor injuries both times. Teach also possesses incredible physical strength which is demonstrated when he seriously injures both Luffy and Ace in just one hit, sending them both crashing back with incredible force and distance.