I don't believe there is a "creative personality" type. The only prerequisite for being creative is the belief that you are. That alone seems to drive creativity.
I would refer you to another
Understanding Yourself and Others book called
Creativity and Personality Type.
Perhaps the other thing that makes some people seem more creative than others is a unique perspective. This just comes from being different from the norm. Since being an SJ is the norm (meaning Si perceiving function) then the other three perceiving functions will seem "creative", and the perceiving function most different, Ne, will seem most creative (and is often an inferior or tertiary function to SJs making it different but easy to relate to).
I think judging functions are a source of creativity also. Accepting the input of other peoples judging functions is probably hardest thing to do.
In general, the more diverse the group the more creative it can be. There have been both experiments and simulations that show that diverse groups tend to outperform groups of "high performers" (I'll have to dig that up) because of the diversity. However, groups have to be structured in a way to accept and utilize this diversity, otherwise the "high performers" will do better than a diverse group.