Value to his stakeholders? Definitely. We should try to imagine whether all Musk's companies would be equally valued by their customer's base without his bold leadership. In full honesty I doubt so. Not only Musk has managed to succeed to recruit very talented people – without whom none of his endevour would have succeeded – but he proved to be (one of) the most iconic figures of our times, who has the ability to execute very fast on his ideas. Today I cannot envision any other leading his projects.