Savant syndrome is a condition in which a person with a mental disability, such as an autism spectrum disorder, demonstrates profound and prodigious capacities or abilities far in excess of what would be considered normal. Some of these people are just people who I think had savant syndrome (I'm not a doctor). Other people are widely accepted savants in history. Some people are thought to have autism, which could have been savant syndrome.
http://www.ranker.com/list/the-10-greatest-people-who-probably-had-savant-syndrome/stokified, all people, people, philosophy,
Abraham Lincoln
Philosophy
Albert Einstein
Physics
Andy Kaufman
Comedic
Bill Gates
Business
Daniel Tammet
Recites thousands of digits in a row.
James A. Garfield
Able to write Latin with one hand and Greek with the other (simultaneously). It probably had a lot to do with him becoming president.
Jesus Christ
Philosophy (controversial, solely my own opinion)
Kim Peek
The real rain man.
Leonardo da Vinci
Polymath
Siddhārtha Gautama
Philosophy