When it comes to describing someone who takes charge and leads a group or project, there are multiple synonyms for the phrase "drives the bus." One phrase that comes to mind is "takes the reins," which refers to taking control like a rider would take control of a horse with reins. Another phrase is "leads the charge," which is commonly used in military contexts to describe someone who leads an attack. Similar phrases include "steers the ship," "runs the show," and "pilots the plane." All of these phrases imply a strong sense of direction and leadership, making them useful alternatives to "drives the bus".