Yasunori Mitsuda takes the cake.
No respect for Western music composers I see.
Koji, Uematsu, Harry Gregson-Williams (tho he's mostly a movie composer) with Konami's inhouse team... (basically whoever writes the music for metal gear solid.
Other than that, All the artists in little big planet, All the artists in that get assembled for wipeout soundtracks
sorry for not listing them all out... I'm lazy


Yoko Shimomura for her brilliant arrange album "drammatica",
e.g. http://www.youtube.com/watch?v=aqqMSKDDNJU or http://www.youtube.com/watch?v=x6HpkYcTjqY
and for lots of other great compositions such as http://www.youtube.com/watch?v=pQcZbQ6UEew
She's my favourite VGM composer at the moment.
Masami Ueda/Hiroshi Yamaguchi/Rei Kondoh for Okami,
e.g. http://www.youtube.com/watch?v=y0CbB-G9MXY (Kondoh) or http://www.youtube.com/watch?v=_XPsYCyZlGs (Ueda)
Hitoshi Sakimoto and his 7 colleagues for Oboromuramasa,
e.g. http://www.youtube.com/watch?v=RwllSL46Grg (Sakimoto)
Takahito Eguchi & Noriko Matsueda for my favourite VGM Piano collection - Final Fantasy X-2,
e.g. http://www.youtube.com/watch?v=L6MBv-4ocT4 and http://www.youtube.com/watch?v=K4xRCCz5ZWM&feature=related
Naoki Kodaka for Albert Odyssey Gaiden,
e.g. http://www.youtube.com/watch?v=O7wIu0aDk5Q and http://www.youtube.com/watch?v=n-SFIEhoKT0
Kentaro Haneda for his Wizardry compositions,
e.g. http://www.youtube.com/watch?v=UKQQjfgCmEM and http://www.youtube.com/watch?v=fNCi0ccAddA
Hiroki Kikuta for Seiken Densetsu,
e.g. http://www.youtube.com/watch?v=b2tniOMDPLs or http://www.youtube.com/watch?v=zaaIBwlFG5U
Shunsuke Tsuchiya for his contributions to Arc Rise Fantasia (his compositions on this OST are better than Mitsuda's and Shimomura's),
e.g.http://www.youtube.com/watch?v=0yE6pIB2eGg or http://www.youtube.com/watch?v=xdaUfIUXV4U
Masato Koda for his brilliant Monster Hunter Main Theme http://www.youtube.com/watch?v=D5kUdEpqewE
Yasunori Mitsuda of course for Chrono Trigger (I'm currently discovering his Xeno works) and more recently for his wonderful Soma Bringer tunes,
e.g. http://www.youtube.com/watch?v=vl-0ymKTtlI or http://www.youtube.com/watch?v=lWUWxOoCKZc or http://www.youtube.com/watch?v=H64pW_jKQYs
Yoko Kanno for her work on Nobunaga's Ambition and Uncharted Waters,
e.g. http://www.youtube.com/watch?v=ETqCEGBowHA or http://www.youtube.com/watch?v=nsreFA5KjYE
Michiru Yamane & Yasuhiro Ichihashi - whoever of those two composed the following fantastic tune for Castlevania-Order of Ecclesia:
http://www.youtube.com/watch?v=bPiQm6-K2kM
Ko Otani for Shadow of the Collossus. I'm not convinced of the OST as a whole, but I love
http://www.youtube.com/watch?v=qR_s3BGLu0s
Kondo & colleagues for Zelda, Uematsu and colleagues for FF.
Lots of more to discover and import from otaku.com, my search for great music will never end... 
Sorry for all those direct links, but my 2 machines (PC/MAC) and 3 browsers seem to be cursed whenever I enter VGC. I can't embed any links.

| CollectiveCynic said: No respect for Western music composers I see. |
Respect? Who said we didn't respect them just because some of us didn't list western composers. I respect them, but I'm not particularly interested in their music. I'm a fan of soundtrack music, but imo the music from western VGM composers sounds too similar to modern movie music and none of their compositions can compete with the works of the best Hollywood/European movie composers (and with best movie composers I mean certainly not modern muzik fabrikants like J. Horner or J. Newton Howard, more legends like Bernard Herrmann, Jerry Goldsmith, Ennio Morricone or Nino Rota).
For example, I like Michael Z. Land's music for my all-time favourite series Monkey Island, but I don't like it enough to listen to it every day or outside of the game. On the other hand, I love Herrmann's brilliant works for Hitchcock, Scorsese and other directors enough to listen to it constantly.
My favourite western VGM score atm is the one for Flower composed by Vincent Diamante, which was fortunately released on PSN recently.

Western:
Matt Uelmen (Diablo series)
Derek Duke (Blizzard games)
Eastern:
Koji Kondo
Yasunori Mitsuda
Nobuo Uematsu
Koichi Sugiyama (Everyone should listen to his stuff, very under-appreciated)
"Pier was a chef, a gifted and respected chef who made millions selling his dishes to the residents of New York City and Boston, he even had a famous jingle playing in those cities that everyone knew by heart. He also had a restaurant in Los Angeles, but not expecting LA to have such a massive population he only used his name on that restaurant and left it to his least capable and cheapest chefs. While his New York restaurant sold kobe beef for $100 and his Boston restaurant sold lobster for $50, his LA restaurant sold cheap hotdogs for $30. Initially these hot dogs sold fairly well because residents of los angeles were starving for good food and hoped that the famous name would denote a high quality, but most were disappointed with what they ate. Seeing the success of his cheap hot dogs in LA, Pier thought "why bother giving Los Angeles quality meats when I can oversell them on cheap hotdogs forever, and since I don't care about the product anyways, why bother advertising them? So Pier continued to only sell cheap hotdogs in LA and was surprised to see that they no longer sold. Pier's conclusion? Residents of Los Angeles don't like food."
"The so-called "hardcore" gamer is a marketing brainwashed, innovation shunting, self-righteous idiot who pays videogame makers far too much money than what is delivered."
Nobuo Uematsu
Yoko Shimomura
Kimi wa ne tashika ni ano toki watashi no soba ni ita
Itsudatte itsudatte itsudatte
Sugu yoko de waratteita
Nakushitemo torimodosu kimi wo
I will never leave you