The word "marshaller," often used to refer to a person who organizes or directs a group or event, has a number of antonyms or opposite terms. These might include words like "disorganizer," "distributor," "scatterer," "confuser," or "muddler." Each of these describes a person who has the opposite effect of marshalling - someone who breaks apart or distributes things rather than bringing them together in an organized way. Other antonyms might include words like "follower," "passive observer," or "acolyte," which describe people who take direction rather than giving it. Overall, the antonyms for "marshaller" suggest a lack of control, direction, or focus.