If you're a fan of Bleach, then you're a fan of the Captains. Unlike the Espada that are all ranked, it's never directly told to the viewer the power ranking of the Captains.
These stats are as Wiki lists them.
Since I'm limited to four pics I'll use multi posts, as my intentions for this aren't for spamming or anything, and count down to the most powerful Captain.
@Super Mods
If you don't want me to do this with multi posts so I can show the pictures, just let me know and I'll change everything to text as soon as I get the message.
edit: thank you super mods for not putting the ax to this thread!
The graph is split into six categories-
12:00= Offense
2:00= Defense
4:00= Agility
6:00= Kidou
8:00= Intelligence
10:00= Physical strength
Well, starting with the "weakest"...

Kenpachi

Total Rating: 390

Kurotsuchi

Total Rating: 430
12:00= Offense
2:00= Defense
4:00= Agility
6:00= Kidou
8:00= Intelligence
10:00= Physical strength

Tousen

Total rating: 460

Soifon

Total rating: 460
12:00= Offense
2:00= Defense
4:00= Agility
6:00= Kidou
8:00= Intelligence
10:00= Physical strength

Komamura

Total rating: 470

Ichimaru

Total rating: 480
12:00= Offense
2:00= Defense
4:00= Agility
6:00= Kidou
8:00= Intelligence
10:00= Physical strength

Ukitake

Total rating: 490

Hitsgaya

Total rating: 500
12:00= Offense
2:00= Defense
4:00= Agility
6:00= Kidou
8:00= Intelligence
10:00= Physical strength

Byakuya

Total rating: 510

Shunsui

Total rating: 530
12:00= Offense
2:00= Defense
4:00= Agility
6:00= Kidou
8:00= Intelligence
10:00= Physical strength

Unohana

Total rating: 540
(who knew? I'm ready to see her kick ass now please)
And then there's Aizen and the Captain-Commander...