I think Gunpei was extremely important in the creation of modern Nintendo. However without Shigeru there wouldn't be a modern Nintendo. Miyamoto was the mastermind behind almost every franchise that drove Nintendo in the past and drives Nintendo today. Its tough but I think without Gunpei Nintendo would still exist, but without Miyamoto Nintendo would have probubly gone the way of Sega over two decades ago. I mean lets face it without Donkey Kong and Mario Nintendo wouldn't have even succeeded in the arcade industry which was the driving force behind the NES and Nintendo as we know it today!
-JC7
"In God We Trust - In Games We Play " - Joel Reimer