The word with the closest connotation to "imitators" as it is used in the sentence is "pretenders."
While "counterfeits" suggests a fraudulent imitation, "replicates" focuses more on copying without the negative connotation. "Tricksters" implies deception for amusement or trickery, which is not the intent in the original sentence. Thus, "pretenders" aligns best as it conveys the notion of those who pretend to be something they are not, similar to "imitators."