Hey, the yanks got a thread after all...
I nominate Per Albin Hansson, who helped make the foundation of the modern wellfare system through Folkhemmet (the People's home), though he's criticized for being a bit 'nazi-friendly' through WWII.
Also, Charles XII, who was a brilliant strategist, but who eventually ended Sweden's status as Great power through a crazy campaign through Russia. He had certain aspie traits.
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"Purity is for drinking water, not people" - Gospel of the Flying Spaghetti Monster.