Larry Johnson is better than the production of your other quartets by himself, so anything beyond that is a bonus.
I'm not sure why you'd think this is of any worth. What draft spots do you have and plan on using for RBs? That would be a much better method of analysis.
Edit: Just for

, I think Maurice Drew would present the more clear value over Greg Jones.
Larry Johnson + Maurice Drew wouldn't be all that terrible, and there are a half dozen RB2 options available between RDs 5-7.
If you happened to be unlucky enough to be stuck with one of those lists, it's your own fault.
If you were stuck with picking from one of these and locking your roster away all season, #4 is the clear winner, because you get two solid feature backs in DD and DWill who will be opening day starters and are both in great situations.
DD is one of my top rated fantasy backs after the big three, and he'll be completely recovered and in full form when the season rolls around. And that means 120ypg + TDs.
DWill is also a rock-solid option, as it's only a matter of a simple training camp battle for him to beat out Foster, who will be a great #2 man.
And then you also have your Gado/Bell who should provide each 2-3 games of solid value (hopefully during your bye week blues

)
The Problem with Edge/JJ/Fred/B3 is that outside of Edge, who is a huge question mark for TDs (although his yardage should still be right up there), you have what looks like a perfect split in Dallas with JJ/B3 and I don't personally believe Fred Taylor will be starting this year very long.