Bumblers are people who are clumsy, inept, or awkward in their actions. Antonyms for the word "bumblers" would be people who are skillful, efficient, and graceful in their actions. Some examples of antonyms for "bumblers" could include "experts," "specialists," "pros," "professionals," "masters," "virtuosos," "geniuses," "adepts," "maestros," and "champions." These words describe people who are proficient in their respective fields and have honed their skills through dedication and hard work. Antonyms for "bumblers" are people who are capable of achieving their goals with finesse, accuracy, and precision.