CCP.
Just look at this.
http://www.youtube.com/watch?v=5J7JJ-QWSx8
http://themittani.com/news/fanfest-dust-514-keynote
http://www.penny-arcade.com/report/article/dust-514-will-change-the-rhythm-of-eve-onlines-warfare-creating-the-most-am
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I have crap loads of different devs that i love, but primarily I have to say Relic. They've made some of my favourite games of all time, such as Dawn of War 1-2, Company of Heroes and Homeworld.