Musk is one of the more technically knowledgeable CEOs in the auto industry, at least when it comes to electric cars. He also knows about rocketry, given that he's also CEO of SpaceX. I can safely say that no other CEO in the car business can call themself a rocket scientist of any sort.
Musk is also not as operationally disadvantaged as some of his critics think. His problem isn't that he doesn't understand how cars are built and sold; it's that he's too ambitious about improving a manufacturing process that might not need it.
But the truth is his real job, his most important one, is to be a car salesman.
The only other top exec to come along in the past few decades who was as effective as Musk was Lee Iacocca, who ran Chrysler in the 1980s. The business world has sort of forgotten about Iacocca, who was an old-school, cigar-chomping cheerleader for his company.
Much of this is because the type that Iacocca embodied isn't effective at overseeing most big, global carmakers in the 21st century. They need to be futurists and diplomats, leaving the rough-and-tumble of grinding out sales to capable lieutenants.
Musk is certainly a futurist, but he's rarely a diplomat. His driving goal is to sell as many Teslas as possible, to end humanity's dependence on fossil fuels. That requires something more like a field general, or a king.