They are ALL chaotic, though perhaps at different levels. You're confusing "chaos" with "anger or rage". Chaos just refers to something disorderly and unpredictable, and when talking about living chaotic beings with a personality you can probably throw in "fickle" as another quality.
Air probably is the most reasonable. Do you read/listen to what the Servant and Lords of Al'Akir and Al'Akir himself say? They all sound very noble and not rageful at all. Al'Akir's story was simply non-existent.