I don't have all the names but at the moment everyday there are importants figures leaving big studios and this affects everyone. In japan with the producer of Castlevania Koji Igarashi who left Konami recently. Stig Asmussen (Game Director of God of War 3) from Santa Monica studios, Jaime Griesemer (Lead Designer of infamousSS) from Sucker Punch, ken levine closing irrational games, Amy Hennig from Naughty Dogs, And so on.
And yesterday Seth Killian has also resigned, another one from Santa Monica. If you add to the list Cliff Bleszinski and David Jaffe, who both left a little further back in time for the same kind of reasons, the list become quite impressive.
I think this would even deserve it's own thread, with a complete list of names, and where we could debate on what is going on in the world of video games in overall. I would do it myself but i can't xD