Autistic heads of states of countries?
Many scientists, artists, and musicians, even actors, are either likely aspies/HFAs or are actually known diagnosed aspies (like Darryl Hannah).
Politicians not so much.
I think that Trump could likely be ADHD (fellow entrepreneur Richard Branson, founder of Virgin Records, is officially ADHD).
Have heard theories about just about every president of the US being aspie (Lincoln, Nixon, and even Reagan), but I seriously doubt that any of those were. Jimmy Carter is a good model for what an aspie president would look like if we ever saw one, but I couldnt armchair diagnose even him for sure as actually being aspie.
At this moment I dont know of any head of state of a major country who strikes me as being a likely aspie, or HFA person.