Maybe I misunderstood the question, but I thought we were judging from the point of view of New Year's Eve 1989.
At that moment, the Repack racers, early Ritcheys, and especially that Saracen look dated beyond belief, even if they were at the cutting edge just a few years previously. The historical importance they have in founding a movement is only really clear with an extra twenty years of perspective.
So if the question is: name some important bikes of the eighties from the perspective of 2010, the Ritcheys and the Saracen (maybe) fit right in. If we're actually sticking to what Dr S asked:
"So here we are. Ten minutes to midnight on the 31st of December 1989 ... we have to pick the best mountain bike ... Let's look at innovation, desirability, craftsmanship, the real icons of the era"
... I think we end up with a different set of nominations. A Ritchey may get points for craftsmanship, but would anyone really pick that Saracen over an RC100 in 1989?