Elvis Aaron Presley was an extremely popular American singer of the 20th century. A cultural icon, he is widely known by the single name 'Elvis'. He is often referred to as the "King of Rock and Roll" or simply "The King".
As far as we can tell, the guy that built this place was considered the coolest of the cool, and taught other people how to be more like him.”— The King, Fallout: New Vegas
In Fallout and Fallout 2 you could find fuzzy paintings of Elvis.