PanoramaIsland wrote:
I voted Sartre, but where's Wittgenstein? The sexy devil deserves some recognition!

Honestly, a lot of people aren't on the list.
Let's just look at the kinds of people not missing:
* No representative of American Pragmatism
* No philosophers of science, from Bacon to Popper to Kuhn to Feyerabend
* No postmodern philosophers, like Derrida, Foucault, or Baudrillard
* No John Rawls
* No non-Western thinkers, such as Confucius
* No Aquinas, Plantinga, or any other religious philosopher save Plato and Kierkegaard(who are unrepresentative)
And well... the list goes on and on, and it is not to the discredit of the OP. There are just TOO MANY philosophers. The list the OP gave is actually not bad at all, and is really fine in most senses for a representative list, even with all of the gaps.