3 adjectives to describe congregationalists

JAMES, JOHN ANGELL, most influential Congregationalist of his time, born in Dorsetshire; was pastor of Carr's Lane Chapel, Birmingham, from 1805 to 1859; won the esteem of all parties; published the "Anxious Inquirer," and many other works (1785-1859).

He was, when he was first settled at Marshpee; but his opinions underwent a change soon after, and he became what is commonly called an orthordox Congregationalist.

how dismally twaddling is that respectable old congregationalist, Mr. Jerome, with his tidy little garden and his "littel chacenut hoss"!

3 adjectives to describe  congregationalists