Speaking of indie, have you tried some of the newer Justin Vernon singles? Prob not exactly what you’re looking for, but heavily influenced by gospel, particularly AUATC and PDLIF. I mean, he seems to be a god guy, but it’s subtle.

As for call and response, I’m a sucker for sea shanties. Singing them in groups is the best (everyone sings the “response”), but there are some good recordings too. Try the Longest Johns for some well-produced recordings. It’s a slippery slope to traditional music though… You’ve been warned.