Though the subjects in front of his lens are some of the most famous people who ever lived, LIFE photographer Henri Dauman managed to create some of the most iconic images of the 20th century without ever becoming a household name. Photographing everyone from Marilyn Monroe to Elvis Presley to Jacqueline Kennedy on the day of her husband's funeral in 1963, Dauman filled the pages of LIFE, Newsweek and the New York Times, among other publications, with photos that play like a slideshow of some of the biggest moments in American history and popular culture. Playing with light, shadow and reflection, his particular brand of magic existed in summoning the essence of people whose work was known to many, but whose true selves were known to few.