The Joe Rogan Experience is still my favorite podcast. He can get a little repetitive with his hunting and bow hunting stuff, but he really does bring in so many different types of people. He had some good ones with Milo Yiannopoulos before his big scandal broke. He's had David Miscavigh's father and Leah Remini to get into Scientology and what its like being out. Just had Megan Phelps-Roper talking about her time in and then after leaving the Westboro Baptist Church and getting into all their protesting methods. Its super interesting getting an inside perspective on how they operated and their feelings/reasoning on their funeral protests. The Graham Hancock and Randall Carlson episodes are always good. Neil deGrasse Tyson is always a must listen. Jordan Peterson, Ghad Saad, Rhonda Patrick, and Christopher Ryan have some good episodes. Just had one with Bret Wienstien from Evergreen College. The Henry Rollins episode was awesome. Plus, there is the legendary podcast #911 with Alex Jones and Eddie Bravo. Gets deep into crazy conspiracies. And he brings on a lot of fighters, comedians, and some musicians. Pretty much always an interesting episode and usually drops a new one about 3 times a week. No matter how you feel about Joey Diaz, he always has some of the most hilarious/crazy stories from life experiences.
Bizarre States with Jessica Chobot and Andrew Bowser. Its basically all things paranormal. Sometimes have some interesting guests and discuss a lot of haunted places and things.
Dan Carlin has TONS of interesting stuff with Hardcore History and Common Sense. Plus, he's got a bunch of stuff for purchase on iTunes. His Wrath of the Khans series is amazing. There is just so much research and detail that he puts in. The Wrath of Khans series is over 8 hours, but its well worth it.