What is the job of the startup (or larger company) CEO?
I think Fred Wilson answered that best in his 2010 blog post.
What a CEO Does: https://avc.com/2010/08/what-a-ceo-does/
A CEO does 3 things:
1) Sets the overall vision and strategy of the company and communicates it to all stakeholders.
2) Recruits, hires, and retains the very best talent for the company.
3) Makes sure there is always enough cash in the bank.