Jeff Russell

Thanks very much for the comment and the recommendation - Hotel Concierge sounds familiar, but I don't think I ever checked it out before.

As for your question, unfortunately, so far JMG is the only full-on occultist I know of who writes so much and so well on other topics. Not writing, but I've found the Hermitix podcast pretty good, but it mostly focuses on spirituality, rather than other topics, but I'm enjoying the currently ongoing series on Lewis Mumford's Technics & Civilization.

I've heard that Rudolf Steiner wrote very extensively on very many topics, and that much of it is worth looking into, but I've only read one short book by him so far, and that was purely on occultism.

Otherwise, I have generally found that recommendations from his commentariat have a pretty high hit rate of "non-mainstream, but not coo-coo for cocoa puffs". Some writers more on the Archdruid Report side of things with spiritual leanings that I've found interesting and helpful, even if sometimes needing to be taken with salt, are wrathofgnon (on twitter), Paul Kingsnorth, and Christopher Alexander. I've also found Jordan Peterson to have good insights into mythology and psychological/spiritual issues, and I think most of what he has to say on other matters is at least carefully considered and coming from a coherent worldview, but I think he's deep in the mythology of progress and doesn't quite know it. He also doesn't delve into the really weird side of the spiritual world (like the occult).

I'll definitely share if I find anyone else, though!