I think Henrik Fiskar should be head of design for Tesla (that would be interior / exterior styling, not engineering design 
) I believe he is one of the most fluid and talented creators of rolling sculpture, the Fiskar Karma, BMW Z8, Aston Martin V8 Vantage, are examples of his work - but a savvy businessman he is not.
This might be a great example to cross reference with that ‘Industrial Designer Entrepreneurs’ thread on how not to get in over your head…