Robby The Robot

Above, a replica Robby the Robot at this year's Monsterpalooza.  Photo by Armand Vaquer.

One 1950s icon was not even human (well, when there wasn't a man inside).

The icon is Robby the Robot from Forbidden Planet (1956). Besides Forbidden Planet, Robby has appeared in other movies and television shows over the decades.

According to Wikipedia:

Robby the Robot is a 7-foot (2.1 m) tall fictional robot originally created in the mid-1950s by MGM's prop department.^[1] The initial design was sketched by Arnold "Buddy" Gillespie, refined by production illustrator Mentor Huebner, and then turned into reality under the direction of mechanical designer Robert Kinoshita.^[2] The robot quickly became a science fiction icon in the decades that followed.

The current whereabouts of Robby The Robot?

Wikipedia says:

The original Robby the Robot suit continues to reside today in Writer/Director William Malone's collection; Malone is the world's foremost collector of original Forbidden Planet materials.