Let's just be honest. While other colleagues exaggerate on their numbers of achievements and accomplishments, and how they were indispensable in the places they worked at, the bottom line is that no one is indispensable. As a matter of fact, if you lead a team, the way you'll be measured is by the way the staff will react and work when you're not around. Period. You're good if you're not "needed". End of story. No single individual creates a show. A show is the collective endeavor and ideas of many.