Final answer:
The employees who could help the train crew most to move a disabled train in passenger service are railway engineers or maintenance workers, along with train dispatchers.
Step-by-step explanation:
If a train crew requires assistance to move a disabled train in passenger service, the employees who could help the crew most would be the railway engineers or maintenance workers. These professionals have the expertise and knowledge in repairing and maintaining trains, and they can provide the necessary technical assistance to get the disabled train back in operation. Additionally, train dispatchers can play a crucial role in coordinating the movement of trains and providing guidance to the crew.