I think Cora fits that description. If, however, you meant that they only need a good fielding CF, well Stern and Durbin fit it as well. If the lineup has Cora and Stern/Durbin in it, then will definitely score less runs than the past three years where they eclipsed 900 runs each season. It is also reasonable to expect that they will have better pitching, provided Schilling and Foulke bounce back, and better defense, thus allowing less runs.
I think the FOs caution about overpaying for Damon and trading off the future to improve the '06 club hinges on the question marks that Schilling and Foulke provide going into the season. It is very unlikely that this club, regardless of the offense, makes a deep October run if those two suck as bad as they did last year. If things were more certain concerning those two, then it would make more sense to adopt a "win now" mentality. But as it stands right now, relying on those two is a big risk, which is why 2006 seems to shaping up as a stay-afloat year. If those two are good, then they can take a loss in offensive production. If they continue to suck, then they haven't put all their eggs in one basket.