HSBC, and before that Credit Suisse. https://www.finews.com/news/english-news/19832-credit-suisse-reorganization-kirsty-roth-master-of-efficiency. From the article, "...British top manager known for her ruthless cost-cutting plans..." and "...the departure of [KR] is probably linked to the recent presentation of the new strategy...the industrialization process, with which [KR] was closely identified, has been moved out of the limelight..."
She cuts. She makes a lot of $$$$. The firm struggles. The firm then changes strategy and reorgs. She departs with whatever package she's agreed to and then moves on to the next organization where she repeats the cycle. Her cost-cutting strategy is really successful - for herself. CR, HSBC, now TR. I wonder who is next.