Kreativ-Konzepter, Design-Thinker, Digital-Transformer.
The best strategists are by their nature instinctive. Given most strategy is, to some level, interacting with or understanding people/their motivations, you’ll often find them as students of humans.
From this, we can at least understand what the strategist does. The strategist is responsible for finding the most effective way to use a current set of resources, amplifying their effort significantly.
Strategists in many ways are professional opportunists, then. They find the best opportunity, create a plan to take advantage of it and plan/direct resources to make the biggest impact possible.