He was not a visionary entrepreneur, that's the whole point. His vision led him to create product flops for 20 years. Markkula on the other hand got it correct with the Apple II from having the right industry knowledge.
NEXTStep? considering the technology forms the foundation for OSX and iOS doesn't look like it flopped.
AppleTV? it's doing better than it's competition, maybe.
Apple Hifi? definitely.
Pixar? I think other animation studios wish they could as good as their worst films.
Over the course of his career most of his "flops" have turned out successful. He pumped millions of dollars over a decade to keep Pixar afloat. And it was him and his technical team at NEXT that turned the Mac into what it is today.
Let's see. Bill Gates, Warren Buffet, Barack Obama, Bob Iger, Rupert Murdoch, Michael Dell, Larry Page, Sergey Brin, Steve Spielberg, Michael Bloomberg, Stephen Wolfram, Jeffrey Katzenberg, Dick Costolo, Steve Case, Marc Andressen, etc. They all think he's a visionary. Should I believe them or you?