I'd take Shape Shifter alone over the entire Namco list, so I voted for ICOM.
Some of those Namco games on Black Tiger's list are among the worst pieces of shit I've ever played for the Turbo. Genpei Toumaden, Wonder Momo, Ordyne, Bravoman, and World Court Tennis are all f*cking awful. And Dragon Spirit is no picnic either.
On the other hand, Samurai Ghost, Splatterhouse, Galaga '90, Dragon Saber, and Final Lap Twin are really cool games. I'd rank most of those above Beyond Shadowgate, in fact. But they wouldn't even come close to making a list of my all-time favorite games, while Shape Shifter would be on it without a doubt.