Toto Wolff has been able to whittle down the Mercedes driver shortlist as the year has progressed. He’s known since the winter that he needed to find a replacement for Lewis Hamilton. It’s a task that could partially define his tenure as team principal. Hamilton is the most successful driver in F1 history, having won six of his seven world championships at Mercedes, and that only increases the stakes. Wolff led the Silver Arrows to a historic run of dominance between 2014 and 2021 as they won eight consecutive constructors’ titles. But they have struggled in F1’s ground effect era, winning jus…