Get keep right people.
A visionary company doesn't simply balance between idealism and profitability: it seeks to be highly idealistic and highly profitable.
The signature of mediocrity is chronic inconsistency.
The purpose of bureaucracy is to compensate for incompetence and lack of discipline.
People need BHAGs - big hairy audacious goals.
Consider the idea that charisma can be as much a liability as an asset. Your strength of personality can sow the seeds of problems, when people filter the brutal facts from you.