(n.) One who conforms; one who complies with established forms or doctrines.

Middle American Philistine anal character arriviste boeotian boob boor bounder bourgeois burgher cad churl clown compulsive character conformer conformist conventionalist epicier formalist groundling guttersnipe hooligan ill-bred fellow looby lout low fellow methodologist middle-class type middlebrow model child mucker nouveau riche organization man parrot parvenu peasant pedant perfectionist plastic person precisian precisianist ribald rough roughneck rowdy ruffian sheep square teenybopper trimmer upstart vulgarian vulgarist yes-man yokel