I agree with your thread title this year, because literally there are no RBs in my Top 15 (after the big 3) that I dont see any kind of legit question mark with. Of them, I think Martin and SJax have the least risk, but still have some concerns.
Due to having the 5th pick and 7th picks in my 2 drafts so far, I ended up with Calvin Johnson in both, who IMO was an easy choice. Come the 2nd round, I couldnt pull the trigger on the high risk/high reward RBs Murray and AD staring me in the face, just feels like too early for that kind of risk despite despite the possibilities. While its clear that RB is a weakness on both of my teams, I dont think it is so weak that it will hold me back from winning a championship - assuming the rest of the teams plays at the level they should.
Team 1: Megatron, Gronk, Marshall, Martin, Harvin, Ridley
Team 2: Megatron, Julio, Martin, Andre, McGahee, Vernon
In both instances, I held off of the RBs mostly due to BPA, and also because I see a lot of safer picks later (though with less upside obviously) as well as upside picks. Team 1 I added MBush and Tate who should be decent flex plays in their own right, as well as Wilson, Vereen (more handcuff), and Dwyer who I see as high upside picks. Team 2 I added Benson, Ridley and MBush again, and Hillman (handcuff) and Dwyer. Just like I didnt plan on waiting for RBs so long early, I didnt plan on taking so many of the same guys, but they are seemed like very nice values and clear choices where I got them.
That said, for my final money league I am without a doubt going RB heavy early, risk early, just to field a different type of team. DMC, MJD, AP, Murray, you name it. I plan on going back to back RBs in the first 2 rounds. I was lucky enough to land IMO the safest non-QB pick in the 1st with Calvin, but my opinion for the past month or so is that if Im picking late 1st, Im taking the RB that is there who has the most upside (likely DMC). If I was you and was picking on the 12/13, I would actually do the same thing unless you want to take Graham with 1 of those picks. Otherwise, Id target a pairing a duo of Forte or FJax (who I think fall on the safer end of the RB risk spectrum) with Murray, MJD, or AP (who fall on the riskier side). Im almost hoping I get a late 1st in my final draft so I can use this strategy for this team (unless I get a top 3 pick which of course Id rather have).