Definitely:
Final Fantasy
Golden Sun (or Sakuraba in general)
Mario
Zelda
Halo
World of Warcraft/Warcraft
Diablo
Castlevania
Mother
Chrono Trigger
Kingdom Hearts
Pokemon
Megaman
Persona (Meguro is the man)
Soul Calibur
Brawl/Melee/Bros.
and pretty much any game Masashi Hamauzu has worked on.
The man (Hamauzu) is a genius. He may not write stuff that is obvious on the surface with just melody+accompaniment, but holy crap, if you take a really good listen to the music from Sigma Harmonics, Unlimited SAGA, Crisis Core, FFXIII, and Musashi, you'll find a ton of amazing things he does with music, and he definitely rewards those who pay close attention to what he's put in his music.
His stuff doesn't have so much obvious memorability to the casual listener, but to the listener with a refined ear who knows how to really listen to what he's done with the music in all the games he's worked on, you'll fully appreciate what he's done in FFXIII. One reason why I find XIII to also be the best of the FF OSTs is that much like how there is a central theme to the game, the same can be said about the music, and it really is all-encompassing throughout the whole game in some very creative and ingenious ways. Not to mention, I just love his compositional methods so much. I can probably hum to you every song from FFXIII, it's all that good.
Not to mention it, he's also a top-notch piano arranger, and is considered to be one of the best in the industry for VG piano albums. He's arranged his own, Uematsu, Mitsuda, and a other composers music for piano albums, and man does he know how to recreate some amazing pieces, in refreshing ways, while still staying true to the originals.
As a M.M. Music Composition student, I can definitely say that he's the composer who's had the most influence on me in many ways. Now off to listen to the arragment "Aquatic Ambience" that he did for the Symphonic Legends concert.