I don't know any fancy-schmancy composers, so I'll go with the vanilla Koji Kondo.
Alberto José González is a great composer, and as far as I've talked to him quite a nice guy! :DAlberto Jose Gonzalez-
A somewhat lesser known composer who has done music for a lot of really different games. I am not sure of the quality of the games themselves but his music is always top notch.
The Smurfs- Act 2 and 8
Turok 2(Game Boy)- Jungle Stage
Lucky Luke (Game Boy)- Train
SANS
I'll see your western composers and raise you one Dan Wentz & Tom Miller, both of which are personal inspirationsbeing a fucking hipster, I'll post western artists that are'nt david wise or grant kirkhope
Nathan McCree
Composer for Core Design. Best-known for making the soundtrack to Tomb Raider 1 to 3. Has just successfully crowdfunded an orchestra recording for the Tomb Raider soundtrack.
Blam! Machine Head - Geophorea
Blam! Machine Head - Ultra VCF
Soul Star
Tomb Raider
Tim Wright
aka cOld stOrage. Composer for Psygnosis. Best known for composing the original tracks for the PS1 release of Wipeout.
Wipeout - Messij
Colony Wars
Wipeout Pure - Onyx
Krazy Ivan - Grunge Prayer
Martin Iveson
Composer for Core Design. Left videogames after Core Design's demise and now post music under the name "Atjazz"
Thunderstrike - Mission Selection
Fighting Foce - Fianl Boss
Fighting Force - Car Park
Thunderstrike 2 - Arms Running
Tom Salta
AKA: Atlas Pug. For a while was the main composer of Ubisoft's "Tom Clancy" games. Now does music for Halo spinoffs.
Ghost Recon Future Solider - Nemesis
HAWX - Ready Aurora
GRAW