I've turned out to be a huge fan of Jack Wall, so: Myst III + IV, Mass Effect 1 + 2 (Stand by for addition of ME3. )
Highly notable others:
Xenosaga I + III (It's not improbable I added XS3 because of the contrast to XS2 - Yuki Kajiura showed with all the certainty you could ask for that she can do more than generic anime J-pop, which warmed my heart TREMENDOUSLY. Especially considering how dreadful the non-cutscene music in XS2 was...)
The Witcher 1 + 2
Riven
Total Annihilation
Dark Reign: Rise of the Shadowhand (Yes, the EXPANSION - not so much the main game, though that certainly didn't suck either.)

(No FF-title on this list for the simple reason that there's SO MUCH music in each soundtrack, and always a good deal I don't really care for. I'm judging the total impression here, not single tracks; otherwise, FFVI's and VIII's end credits would be on the list. Alas for Esthar and the Auction House.)