Okay. Thanks for clarifying.
I still would drop Johnson. Of the backs you list, he is the only one who clearly is not slated to play barring injury. LJ has upside for keeper leagues, but your situation requires that he be dropped.
I would still lean toward Buckhalter as your 2d drop. Many may disagree, likely targeting A. Smith because he is an unexciting player or Barlow because at present it is unclear that he is the "starter" whereas Buckhalter presently is the "starter." My reasoning for sticking with Buckhalter is, in part, contained in the earlier post. Add to it that the Eagles RBs do not do a lot of punch-it-in scoring as compared to other teams because of the McNabb factor.
I think A. Smith will get his share of goal line love to make him worth keeping, if for nothing more as trade bait. Barlow probably will be starting in SF before year end and assuming Garcia's back holds up will be quite valuable (top 10 RB) as an everyday starter in that offense. A.Z. is a little brittle himself and likely to lose goal line love to Bettis, so you may want to give him a hard look.
The best advice I can give is to try to work a trade with someone. Pick Johnson and one of the other RBs and see if you can pull off a 2 for 1 trade and pick up a decent WR, solid back-up QB, etc.