I have way too many in my feed, I swear every time I unsubscribe from one I haven’t listened to in a while, two more take its place.
To answer my own question, it would probably have to be RevLeft Radio for sheer educational and inspirational purposes. Top tier leftist podcast. I do like trillbillies for a little more levity with my depressing leftist content though.
It's not political at all but Where Should We Begin by psychologist Esther Perel is definitely the most useful and educational podcast I've listened to, so it's definitely the one I would keep.