Nintendo have been pretty much been releasing highly memorable and praised games year-on-year. Most of which have a big designer behind it or at least providing advice, whether it's Miyamoto, Sakurai, Aonuma or whoever.
But of course, times are changing. These people have been in the industry for decades. A new generation will need to take its place so they'll gradually move into coaching roles to pass on their knowledge and experiences.
Also, most games developed by large companies are hardly ever attributed to a single person. It's a lot more collaborative now as studios get bigger and more people are involved compared to back then (where most well-known designers got their popularity from) when it was couple of developers writing assembly.