One of the great CEOs and marketers. Apple was able to make technology appealing, accessible, and usable for the masses, and it was Jobs's vision who made it thusly.
In the contemporary era, if he wasn't the greatest CEO, it doesn't take long to call roll (maybe Bill Gates or Jack Welch- apples and oranges comparisons in both cases).
It'll be very interesting to see what happens to Apple over the next several years. Did he leave a legacy that can be carried forward, or was the equity Apple built over the past ten years especially his vision primarily?
In either case, RIP to Jobs, and best wishes to his family and friends.