The antonyms for the word "most come-through" would involve terms and phrases that suggest a lack of reliability, dependability, or success. Words such as "unreliable," "untrustworthy," "unaccountable," and "ineffective" could be considered as antonyms. Other antonyms may include "non-committal," "hesitant," and "irresolute," which imply indecision or lack of follow-through. Additionally, phrases such as "let down," "drop the ball," and "fall short" could be considered as antonyms for "most come-through," as they indicate a failure to achieve success. These terms and phrases paint a picture of the opposite of "most come-through" - a person or thing that cannot be relied upon to deliver the desired outcome.