TWO STEPS FROM HELL: Thomas Bergersen and Nick Phoenix.
There, the holy trinity in music. EVERYTHING they do is good. Even their dubstep.
Now there are some others, Audiomachine for example. They have a lot of tracks uploaded to their official youtube page: http://www.youtube.com/user/audiomachine1
Even their last Milennium album, which totally rocks.
Now James Newton Howard is particularly specialized in epic soundtracks such as Dinosaur, Treasure Planet, King Kong, Atlantis: The Lost Empire, The Hunger Games, The Last Airbender and more. (obligatory movie sucks comment)
You might also want to check out some of the stuff by Jo Blankenburg, his most recent album has some really really nice tracks. Jasper Blunk has only a few released tracks but so far I think he is really good. Ilan Eshkeri composed Stardust, a heartwarming score to a heartwarming movie.
You might know Steve Jablonsky for his work on Transformers, but if you don't: just putting it out there. He also did the scores for The Island (the soundtrack that got me into orchestral music as a whole) Battleship, some horror movies and Dragon Wars.
X-Ray Dog will be mentioned here but I think they've massively dropped the ball after their K-9 Empire albums so don't really bother with them unless you want to dig deep for good tracks.
There was this little group called 8Dawn, their only good albums are Torn and The Dawn but they're worth checking out.
Occasionally I enjoy music by Immediate Music but most of their albums are a painful experience. Themes For Orchestra and Choir were what made them famous and for good reason. They were the first to try what others hadn't yet done in trailer music: heavy orchestras and choirs. Everyone else followed their lead. All three Themes albums are masterpieces in cinematic music, but that's about it with them. Most if not all other albums focus on the cheaper kind of trailer music. There is this album called Epic Choral Action, but it's kind of like a micheal bay produced album.
Harry Gregson Williams is often overlooked but you should check him out. He did the Narnia Scores and some other good stuff.
A Hans Zimmer mention is obligatory. I personally feel he's a one trick pony at times, but he does a good trick either way. Pirates Of The Carribean, Beyond Rangoon, Blackhawk Down, The Da Vinci Code and Inception are my favorites of his work.
Groove Addicts and Ninja tracks collaborated on the Full Tilt Series. They're great, go check 'em out.
Mark Petrie as a composer is all over the place. Most of his music is kinda.. 'weird' but enjoyable nonetheless.
Epic Score is what it says. Most of it is off-the-line production music but their later albums are a little bit above average.
MAN. I could go on and on and on. Maybe I should just copy/paste my itunes library on here but I worry about crashing the servers.
Brand X Music, Benjamin Bartlett, Bear McCreary, Basil Pouledaris, Clint Mansell, Clinton Shorter, Alan Silvestri, Andrew Lockington, Thomas Newman, John Williams, Craig Armstrong, Nightwish, Future World Music, Ludovico Einaudi, John Murphy, Trevor Rabin, Jack Wall, Sam Hulick, Alexandre Desplat, etc. etc. etc.
I just get passionate about these things.
