The antonyms of the phrase "most doctrinal" are words that are not concerned with religious dogma or beliefs. Some antonyms include unorthodox, unconventional, nonconformist, freethinking, liberal, progressive, and avant-garde. Instead of adhering to strict religious doctrine, these words imply a more open-minded approach to beliefs and ideas. Individuals who identify as unorthodox or freethinking may question traditional religious teachings and explore alternative spiritual practices. Meanwhile, those who describe themselves as avant-garde or progressive typically embrace new and innovative ideas, rather than sticking to long-established beliefs. Overall, the antonyms of "most doctrinal" reveal a spectrum of beliefs and practices that exist beyond strict religious dogma.