Well that's well and good, but it's also smug and elitest. The value a person creates is a function of the single achievement and the number of people who use or benefit from it. By that measure, I think you would have to say that even if you consider the Mac, iPod, iPhone, and iPad small achievements the multiplier means Jobs created TREMENDOUS value.
If, by salesman, you mean someone who understands the needs of people and satisfies those needs even when they don't recognize them for themselves, then yes Steve Jobs was a salesman. And, we should all aspire to be such salespeople.
It's wonderful and good to pursue knowledge and discovery in a vacuum when everything is insulated from reality. It's a whole other thing to take the theoretical and apply it for practical use in a culture of incredibly complex and changing people. Arguably, this is much harder than the academic pursuit because the target is ever-changing.
What Steve Jobs did was not some smoke and mirrors bullshit. He was not a snake oil salesman. He CREATED! And he CREATED things that people love to use.