Michael,
I actually wrote a piece on the Kimball Art Gallery, so I too am a fan, but greatest ... not so sure.
Tom,
I like that choice too.
I'm actually suprised that Frank Lloyd Wright wasn't the commmon response. Or even Louis Sullivan ....
To do the topic justice, it should include what architectural aspect or theory from one of these architects applieds best to golf architecture.
For example the theory of compression and release by FLW definately can be used in golf design.