Someone who conforms to established standards of conduct (especially in religious matters) WordNet 3.0 & Open English WordNet

Followers of Anglicanism in England Wikidata

Someone who conforms to established standards of conduct. OmegaWiki

In English history, a person whose religious practices conformed with the requirements of the Act of Uniformity and who was therefore in concert with the established Church of England, as opposed to those of the Nonconformists, whose practices were not acceptable to the Church of England. Wiktionary

Someone who tries to conform to the mainstream. Wiktionary

Someone who conforms. Wiktionary (translation)