One for the obscure, eh? Jean-Louis was never heard on the radio, and who knows which voice represented Omega 11 (I THINK there may have been a "This is Omega 11" clip, but I don't quite remember).
I can't list my favorite main pilots, since they're all silent. And, you know, me. But I rate the games AC2>AC5>AC4>ACX>AC6>AC>AC3(US)>ACA. 6 only being so high due to the kick-ass support system and the Marigold. That guy's such a badass.