Perhaps not. Mr Downey's performance is not achieved by raw personal magnetism alone, but requires a substantial crew to deliver the fully polished product. The cost of creating Tony Stark runs at roughly $100m per hour. I doubt even the astronomical budgets of astronautical agencies could absorb that.

As for Mr Musk's personal style, I found this interview quite captivating. All the more so for his lack of bluster and posturing.