Adrian Tchaikovsky's "shadows of the Apt" is a 10-book series that's now finished. Author starts off with pretty poor characterization (imho), but gets much better.
Tom Lloyd has a 5-book series "Twilight Reign". Likewise, characterization in the first book is iffy, but world-building is quite solid, very "Malazan-lite".
Jim Butcher's "Codex Alera" is a 6-book series. Bk1 is pretty average, but Bk 2 is awesome, and the rest is crazy and action-packed. The're the Roman Empire, pokemon (kinda), and Zerg, and it all works.
Re: Wars of Light and Shadow: I've read the first 3, and have the 4th (which is the start of another "arc". All the books feature the same conflict between 2 main characters, but it unfolds in stages, is my understanding. So far the series is good, but wordy. Hard to read them back-to-back.
Harry Turledove's "Darkness" series is a re-telling of WWII, but with magic instead of technology. I read the first 4 (the series is out of print in Canada, I haven't been able to find the last 2. Yet), and it's certainly epic, and the stories are fascinating.
Stephen King has a 7-book series "the Dark Tower". I've heard great things, though I'm yet to sink my teeth into it properly.
Paul Kearney's "Monarchies of God" is a 5-book series, though it's usually available in 2-volume omnibus. Nice alt-history with a subtle magic presence, but the ending was a bit rushed.
Glen Cook's "Black Company" was originally 10 books, but now it's available in 4 volumes. It's gritty military fantasy, and certainly fits the "epic" part.
Charles Stross had a 6-volume series "Merchant Princes", about dimension-hopping traffickers. Nov available in 3-volume omnibuses (2 books each). I've read 4/6 so far, it's deep and well-plotted.
"The Witcher" is a series of 2 short story collections and 5 novels. It's VERY good, some of the best "low-fantasy" out there.
EDIT: another one I forgot: "The Death Gate Cycle" by Margaret Weis and Tracy Hickman. 7 books long. It's dated, and the ending's rushed, but it has some interesting twists for an "old-school" fantasy series. Worth a look.
EDIT AGAIN: NEal Stephenson's "Baroque Cycle" is published as a trilogy, but it's actually 8 books. It's an alternative interpretation of OUR history, with a bunch of adventure novel-type plots thrown in, mixed with a crash course on the origins of modern banking system. It's awesome. There's a sequel-of-a-sort "Cryptonomicon", which is set in modern times and is also super-amazing.
This post has been edited by Mentalist: 27 October 2015 - 02:21 AM