Complementary skills are vital for your team to succeed. This sounds like a simple concept, but it’s much harder to get right in practice.
In my experience, I’ve seen that some entrepreneurs are ideas-people who are strong at conceiving ideas, whereas others of us are more operations/implementation-people who get things done. Very few individuals are both. You definitely need both skillsets to make a successful business happen. So if the entrepreneur doesn’t have both, you need to have someone on your team who has the skillset you lack.