I love the Joe Abercrombie books narrated by Steven Pacey. Recommend them to anyone who likes dark fantasy.

The discworld series narrated by Nigel Planer and Stephen Briggs are EXCELLENT

Andy Serkins also narrated Lord of the rings and the hobbit. So that’s a place to start too. Personally I think Marc Thompson is great. He narrates tons of Star Wars audiobooks, if that’s interesting for you.

I have a hard time recommending a specific narrator, as it (for me) totally depends on the book.

I haven't heard this Silmarillion, but I really enjoyed The Expanse narrated by Jefferson Mays.

My absolute favorite audiobook narrator is the late Frank Muller. I'm currently listening to his narration of Interview With The Vampire and it's incredible how well he's able to convey the tone and atmosphere of the story.

I first encountered him when I was listening to the Dark Tower series by Stephen King. When I discovered that (due to his passing) the series switched narrators after the fourth book, I considered switching to the print copies rather than hear someone else narrate those books. I'm glad I didn't, because George Guidall did a very good job finishing up the series, but no one can quite compare to Frank Muller.

I still do both regular reading and audio. I definitely find that some narrators hold my attention better than others. I need to start noting the narrators along with the subject matter.

the narrator make a big difference to me too. While I haven't listened to this narrator in particular, I really enjoyed these productions lately on audible

Dune - has multiple voice actors

Star Wars: Heir To The Empire - happens after the orig trilogy, really good voice actor and also has some sound effects

The wheel of time: Eye of the world - Michael Kramer narrated really well here.

To Sleep in a Sea of Stars - Story itself was really captivating. Narrator Jennifer Hale was also fantastic

I really liked the narration of The Adventures of Amina al-Sirafi. Two narrators actually, one who does the first person narration of Amina which accounts for the majority of the story, and one other narrator serving as a story teller filling in narrative details, letters that appeared between chapters, and that sort of thing.

The narrators felt like they were part of the world the book describes, and Amina's parts in particular are told as though she's recounting her story at a tavern (complete with occasionally turning away to shout at a particularly obtuse listener). In short, it feels exactly like you're listening to the pirate captain recounting her own tale.

Project Hail Mary read by Ray Porter is amazing!

Others have given great suggestions for good narrators but I just want to add that audiobooks work best for me when I'm doing something else to keep busy. I have a job that doesn't require much brain power or interacting with people so I can use earbuds at work and that's my favorite time to listen to audiobooks, I got through the three body problem in 2 days and over the last 2 days I've gotten 3/4 of the way through the second book. I've also gone through the whole series of The Expanse on audiobook as well.

Give em a shot when you're doing tedious chores or out for a walk, or at work if you have a job that allows it. I've heard of others that like listening to audiobooks while driving but I've never done that. I've tried listening to audiobooks without doing anything else and my mind wanders to much, and if I try to read along with a book in my hands then I tend to read to fast to keep up with the narration and it just ends up being a distraction.

My favourites are Stephen Fry and Michael Kramer.

Have listened to most of the ‘Cradle’ series by Will Wight, narrated by Travis Baldree. He does an excellent job.

Project hail Mary audiobook has great narrator IMO.

Jonathan Keeble is great. I loved his reading of the Saxon Stories series (The Last Kingdom). I'm currently listening to the Warhammer Gotrek & Felix series, which he brings his great range of voices to as well.

Bonus note: He voiced Maliketh in Elden Ring and Lord Rydell in the Demon's Souls remake.

Almost anything by Ray Porter is incredibly well read and well produced. NOS4A2 read by Kate Mulgrew is solid.

I think anything narrated by Julia Whelan is great. She has a beautiful voice, and does an amazing job of making each character have a unique voice. Both male and female characters which a lot of audio book narrators struggle with. It’s really impressive.

If you can find it, C.S. Lewis' "The Screwtape Letters" narrated by John Cleese is an experience.

Voice is the most important factor for audiobooks.

One narrator with a great voice is Tom Parker (aka Grover Gardner).

Here is his reading of The Dharma Bums (on youtube).

World War Z is fantastic as an audiobook. If you're not familiar, it's written as a set of interviews of people who lived through a zombie war. The author, Max Brooks, voices the narrator/journalist and actors like Alan Alda, Mark Hamill, Carl and Rob Reiner voice the various interviewees. Mark Hamill doing the Battle of Yonkers is a highlight.

Wayne June has excellent readings of Lovecraft's works.