Leaders must lead by example. Which suggests that a creative leader must also create ideas which are brilliant and path-breaking.
But, that's not really true. Many creative performers become bad leaders, even bad Creative Directors. Because they keep on focusing on their own performance, rather than uplifting the creative-game for the team as a whole. The real task of an innovation leader is to create a culture of trust and harmony where people can share their ideas without hesitation, where they are not worried about being laughed at. And ken Robinson adds the cherry on the top--where they feel their ideas are not just listened to, but valued.
So, if you are entrusted with innovation leadership in your organisation, sure find some good performers, but above all, work on creating a culture which enables the free dialogue, empathy to people's point of view and readiness to be criticized without being defensive.
When you have such an atmosphere, the ideas will arise from each nook and corner of the organisation. Because ideas are always there. It's just that people are not confident enough to share with each other.