Steve Job's genius was often (and continues to be) manifested thru Jony Ive's product design.   Maybe not only his design, but his ability to communicate his design and inspiration.  Here's a bit of Jony's genius yesterday at WWDC:

I think there is a profound and enduring beauty 
in simplicity
in clarity
in efficiency
True simplicity is derived from so much more than from just the absence of clutter and ornamentation.  It's about bringing order to complexity.