Interesting post and one in which I'm grappling with because my background has been working with many corporates across different industries. In the last few years, been in the financial services sector so no, wouldn't say they're creative however there had been elements within business units that espoused creativity in their problem solving to business issues. Also, one particular organisation enterprise L&D has been open to new and innovative learning approaches assisting the business units to use more creative solutions when it comes to training - but they still have some way to go to encourage and inspire their business units with these approaches.
In my travels, I've heard of a company called Atlassian who may also be included in your list. It's a company that has been mentioned by various people also on a Ted talk.
It's heartening to hear of such places - gives me hope that I can work in a place where I'm free to explore, be curious, learn from teams and work on problems - and to be allowed to be creative.