The term "most schismatic" refers to something that is divisive and contentious. Its opposite, or antonym, would therefore be something that is unifying and harmonious. Words such as "inclusive," "cooperative," and "collaborative" would fit into this category, as they suggest a willingness to work together and achieve common goals. On the other hand, words like "conformist," "consensus," and "unanimous" suggest a lack of independent thought or willingness to challenge the status quo, which may not be the intended opposite of "most schismatic." Overall, the antonym of "most schismatic" would depend on the context in which the word is being used.