Chess grand master Bobby Fischer is dead. I remember this guy's shenanigans from the early 70's when he had those legendary matches with Boris Spassky.
In the last 30 years he seems to have turned into a complete nutcase, violating the US ban on trade with Yugoslavia during the Bosnia war, getting arrested for travelling on a revoked passport, and much more.
His life really illustrates the stereotype of a tortured genius. If the guy wasn't a chess grand master he would just be considered a lunatic.