There are various synonyms that can be used in place of "one at wheel". These include "driver", "pilot", "chauffeur", "operator", "conductor", "navigator", "keeper", "steersman" and "captain". Each of these words has a slightly different connotation, suggesting different levels of control and expertise. For example, a "pilot" suggests someone who is skilled at operating a vehicle or aircraft, while a "chauffeur" implies a driver who is hired to provide a service. The choice of synonym may depend on the context of the sentence and the level of formality required. Regardless of which word is used, the "one at wheel" is a crucial figure responsible for safely navigating a vehicle.