The thing with RBSV and caamasi's, the CN's don't count as a legal target, so an enemy without accurate can still shoot someone behind the CN (unless you base it with the CN, in which case it just moves away from the CN.) I believe an enemy with accurate can still target the nearest follower behind the CN's, as well as any droids or commanders. So the RBSV wouldn't be too helpful, IMO.
As for other fringe followers...I've seen a Felcor used quite effectively, as well as Corellian Pirates. Rodian Scoundrels get +4/+10 either way, cunning or Opp, so it's up to your venue, as far as what the other players normally run. Instead of a rodain BSV, I'd go with a Rodian Hunt Master, though, so those CN's shoot for 20...