Not sure if this was confirmed anywhere, but my impression was that each book would focus on a different order, and the main character of that book would be a member of/the founder of that order. The following are characters he's mentioned as being main characters and their orders.
Kaladin - Windrunner
Shallan - Lightweaver
Szeth - Skybreaker
Dalinar - Bondsmith
Jasnah - Elsecaller
Renarin - Truthwatcher
Lift - Edgedancer
Taln - the Herald the Stonewards followed
That leaves Eshonai as a main character without an order and the orders Dustbringers and Willshapers. Of the two orders, I believe Eshonai fits the Dustbringers better. My impression while reading was that the Dustbringers weren't angry the way some people describe them; rather, they were just misunderstood. They had destructive powers and a willingness to do what was necessary, which gave them a bad reputation. I believe Eshonai fits this perfectly, like when she tries stir form first even though it might be dangerous because it could save her people. This might just be a coincidence, but Dustbringers were also called Releasers, and Eshonai is partly responsible for releasing the Everstorm.
That just leaves the Willshapers without a character. Of all the characters, I believe Rysn fits their description best. They loved adventure and oddities. She did a dangerous stunt and broke both her legs to complete a sale for a rare item. Besides, the item they were trading for was a dead creature that kings trade fortunes for. At the end of the chapter she got a live one which hasn't been seen in years and the people of the island have no control over. Those creatures sound an awful lot like spren to me…