You are seriously underestimating the importance and potential of communication. Excellent communication conveys expectations, specificity, and manipulation in ways you are not capable of imagining without so being skilled. It’s the difference between effective leadership and being a tool.
If you want to talk about personality the member of the big 5 most correlated with intelligence is openness. The member with the highest negative correlation to intelligence is conscientiousness. To be skilled in any kind leadership you need both high intelligence and super high conscientiousness. To be skilled in writing you need high openness and at least moderately high conscientiousness.
Irrespective of creativity and intelligence you need some amount of conscientiousness to be goal oriented. That is just yourself. To direct others to do the same you need that plus excellent communication skills. There are no shortcuts or alternatives here.
