my assumption of their primary goal is to 1) be entertaining (as it is advertising of a sort) and 2) have fun. being optimized does not necessarily have to be a requirement for them (though it could just as easily be a requirement - since i'm not them, i don't know).
Amen to that. Fun should definitely override optimization.
For best entertainment value, I suggest a fop ... er, a bard. Acquisitions, Inc needs someone to sing their praises and convert their misdeeds into deeds.
Failing that, I'd suggest a primal character. A druid or barbarian might provide an interesting counterpoint to the otherwise traditional character roles, plus make for some interesting in-party roleplay opportunities.