Dresden Files is amazing. James Marsters gets better and better on the audio. First couple books and performances have some kinks but it just keeps ramping up.

I thoroughly enjoyed the Dark Tower series by Stephen King and since I’ve listened to and enjoyed most of those you listed I believe there is a high likelihood that you might find the series enjoyable too.

Codex Alera! It has been really fun listening to it.

But for the best experience, any of Brandon Sanderson’s books in Graphic Audio are the best. Graphic Audio has just started doing the Red Rising Trilogy now too!

Here are a lot of recommendations from me. I tried to order them to a semblance of categories.

Military science fiction

• The Lost Fleet series by Jack Campbell. This is a barebones tactical fleet combat series written by a former US Navy officer. Don’t expect much of character development, but stay for the combat scenarios under imperfect information conditions. Very consistent narration throughout the series and its spin-offs.
• Frontlines series by Marko Kloos. Boots on the ground combat series. The author is good at turning around some common tropes, so the twists tend to be fresh and quite unexpected. As it is narrated in first person, the narration is adequate, though not stellar.

Space operas

• In Fury Born by David Weber. A very long one-shot book, which is superbly narrated. It teared me up a few times.
• The Icarus Hunt by Timothy Zahn. The author is best known for his Thrawn Trilogy, and this book also feels like set in a Star Wars universe, even though a little more light-hearted. Very good reveal at the end, and the narration is more like acting.
• Troy Rising series by John Ringo. One of the few modern uplifting science fiction works I can think of. Another good narration.
• The Interdependence series by John Scalzi. Unless you can’t stand Will Wheaton’s voice, this is a good series. Scalzi matured as an author and Wheaton as a narrator, and together they deliver a solid trilogy. Everything else by Scalzi is hit-and-miss, either due to very raw writing, money-grabbing pointless sequels that are essentially a retelling of an earlier book, or Wheaton’s tendency to turn even the most tragic scenes into a joke.

Light-hearted books

• Project Hail Mary by Andy Weir. The book is essentially a high school general science book dressed as science fiction, but the writing style and narration gave me quite a few chuckles.
• Will Save the Galaxy for Food by Yahtzee Croshaw. One of the few authors who can pull off narrating their own books. It’s got its own sense of dry British humor that I appreciated.

Best author-narrator combos

• Alastair Reynolds, narrated by John Lee. Reynolds’ prose is usually dark (think of Giger-esque organic gothic visuals), and the characters all sound very dramatic. Lee is absolutely perfect for those.
• Neil Gaiman, narrated by Neil Gaiman. He is incredibly inventive, from The Graveyard Book and Neverwhere, to American Gods and Anansi Boys. He is also absolutely perfect in narrating his works. I don’t know whether his collections of short stories got narrated (I only read those), but if they did, they are the closest thing to Ray Bradbury’s short stories you get these days.

Few books I listened to after the expanse in no particular order.

Freedoms Fire by Bobby Adair Based in a future where earth has been basically enslaved by an alien race and forced to fight in their war.

Mech Wars by Scott Bartlet Far future where humanity wormholes to another galaxy to start over but the new system is run by a big Corp that does big Corp things.

The Messenger series by J.N. Chaney and Terry Magert Kind of childish but I actually really enjoyed it. I will say there is a shit pile of books imo and they aren’t very long. Like 6-8hrs each if I remember correctly. But also far future dude gets his hands on a mech suit and goes traveling to get to to full strength as well as defeat enemies along the way.

Commonwealth Saga by Peter F Hamilton Humans basically have portal tech and can travel around using work holes. Been awhile since I listened and it didn admittedly take some strength to get into it at first but I really enjoyed the depth after I got used to it.

The series that made me fall in love with audio books was Red Rising. The narration of the first trilogy is top notch.

I just finished listening to The Shadow of the Lion by Mercedes Lackey. Richard Ferrone is the narrator and I didn’t have any complaints about his reading. You would probably like Waylander by David Gemmell. Sean Barrett is the narrator and he did his usually excellent job reading.

It’s not sci-fi but Kingkiller Cronicles is some of the first fantasy I tried and it was excellent. It gets sciency enough to keep me interested. Ideas from chemistry, thermodynamics, physics are prominent in this magical world. But the reason I recommended this series is because it is well written, exceptionally engaging, and the reader is awesome once you get used to his voice.

For scifi I recommend Three Body Problem (lots of cool ideas based in physics and an excellent story) or Expeditionary Force (Lots of AI/programming humor and space travel scenarios).

I just finished listening to the most recent book in the Red Rising series by Pierce Brown. Every one of the books has been fantastic, but a few books in they started using a different voice actor/reader for each of the different narrators, and it really brought the characters to life for me. I eagerly await the next book.