I was buying in on Forte until I looked up his numbers inside the opponents 5, any down.  He's scored on about 18% of attempts (10/56), where Bush was 5/7 last year, and 40% (16/40) in his career.  The results are similar if you take it in to the 3 (Forte 9/40 [22.5%] Bush 18/35 [51.4%]).  Those numbers may mean nothing, but I take them to add statistical support to the claim that Forte isn't a good goal line back.  If he continues to perform like that down there, I have to believe it won't be long before Bush has his role back as the primary short yardage/goal line back.  If it's PPR, I love Forte for the catches, not the potential GL work.  In non ppr, he's probably the best choice here for the high potential total yardage, but it's not a confident pick for me.
I'm honestly scared of all 4 of them though.  In non PPR, I feel pretty good about Ridley, but his lack of catches scares me in ppr.  I haven't been comfortable with CJ1.2ishK in a while, and the Greene signing concerns me a bit about a GL vulture.  Jackson just feels like there is really limited upside there.  I love SJax in the late 2nd, early 3rd, but at that 1/2 wrap I want to be taking guys who I feel have top 6 upside at their position.