You should have a solid pitch and be sure you have some initial interest from investors or first customers before even approaching someone to be a CEO of co-founder, as no one worth their salt will consider executing your ideas without proof of concept etc.

Maybe I don't know your situation, but why wouldn't you be willing to back it solely yourself or take the most risk if your ideas are so solid? If I was an investor or potential Co-Founder and you proposed this sort of arrangement, the next question would be "what kind of ownership and equity stake are you aiming for?" and "why not be at the helm of this thing?"

Essentially if you're looking for someone else to take the risk, put up the money, raise the funds or build the business, the question remains why? Are you am idea generator but not an executor? Are you not able to second the time needed to develop the business? Are you lacking industry contacts to help make it happen?

In order to really answer this question we need more information!