So, I saw the name Edward Luskin mentioned on some wingnut's blog that doesn't bear mention, and not knowing who that was, I Googled him. The second and third hits describe him as "The Stupidest Man Alive." (The first hit is his Wikipedia entry, where the same title is mentioned.)
Turns out he's also a contributor to the WSJ op-ed page, so the plausibility of the title cannot be overstated.
But, I thought, what about that other guy? (clickety, clickety) Hmm. I suppose a distinction could be made:
Donald Douglas Feith's crown of "the dumbest fucking guy on the planet" does not necessarily mean he's alive.
Okay then! Trophies for everyone!