Design is a team sport. Look at any great design, even those designs with a strong designer personality as the hero/spokesperson, and you’ll find a team of people who made that design come to life.
One question we found to be quite telling was when we asked, Who is on Project X’s design team? There were two types of answers. Either they’d say the design team consisted only of those people with the official title of Designer, or they’d give us a long list that included everyone working on the project without regard to their job title in the organisation.