I searched for a thread about him, but came up empty-handed. Still, I have trouble believing that there isn't a Vonnegut thread out there, and I stand ready for a link if there is.
Anyway, what type do you think he is?
I see well-used Te in his writing, as it's simply-worded and very easy to follow. His far-reaching implications about life and humanity seem fueled by Ni. This leads me to guess, very tentatively, INTJ.