Iconic, with some historical interest? How about a Smith 36 or 60? One of the Centennial snubbies--mine is a 640, but there are a few 40's around. Maybe a Colt Detective Special, Agent or Cobra.
The snub revolvers have taken a very prominent place in handgun culture over the last sixty years.
I'm prejudiced. I love Smith J-frames. But a good older Model 15 would be a great addition, as would a Model 10.
"Don't let macho be your epitaph."