Dracula Mihawk: The best swordsman in the world.
Jinbei: Karate newt (鱼 人 空手 Fishman Karate). It is a gyojin (Japanese Man-fish) and hence has the ability to breathe underwater, a monstrously large force and physical qualities overflowing (after renouncing his title of Shichibukai)
Sir Crocodile: Logia type Devil Fruit, Suna-Suna no Mi, which lets you control the sand and turn your body into it. Also uses a poisoned hook (removed from office by the conspiracy Arabasta).Donquixote Doflamingo: unknown power that allows you to manipulate people like puppets, as well as to cut their opponents using a course thread. Perhaps it is a Devil Fruit.
Bartholomew Kuma: Paramecia type Devil Fruit, Nikyu-Nikyu no Mi, creates compressed air pumps, repel attacks with the pads of your hands and you can teleport, etc. Pacifist Cyborg type (government military project).
Gecko Moria: Paramecia type Devil Fruit, Kage-Kage no Mi. (Draw and manipulate the shadows) (removed from office and killed because they are considered weak, at least in regard to his earthly body.)
Boa Hancock: Devil Fruit Paramecia, Merro-Merro no Mi (power of Medusa, petrifying people). Haoushoku Haki.
Marshall D. Teach: Logia type Devil Fruit, Yami-Yami no Mi. Controls the darkness, gravity, and can steal and use the powers of the Devil Fruit users dead, although so far only been used once that power) and currently has stolen the Devil Fruit type Paramecia Whitebeard, Gura -Gura no Mi (monitors earthquakes and create earthquakes and tsunamis), is currently the only one who controls two Devil Fruits (Shichibukai resigned as having achieved its goal.)