Christopher Thomas Knight — a guy who lived in a remote area of Maine for 27 years. He avoided almost all human contact despite living within 1 mile of a few summer cabins. He stole food and basic living supplies from those cabins, and was eventually captured and sentenced for the small thefts, but the judge and other officials were sympathetic and went easy on him.
Lykov family — A Russian family of 6 who lived in isolation for 42 years because of religious persecution.