My top 5 rookie RB's:
1) Fournette- he'll get the opportunity right out of the gate and given the pedigree will also have along leash
2) Cook- a long list of off field issues and he was still the 3rd RB off the board. Given the QB situation, he'll be catching a lot of dump offs right out of the gate.
3) Mixon- one significant incident dropped him down to the 2nd round. Viewed as the most talented back in the draft. I don't know how I feel about the situation though
4) CMC- I like the versatility of this guy. He should have more value in ppr leagues. If all goes well, he can be a Reggie Bush type player
5) Williams- Hyde is made of glass and there has been enough smoke around Williams having a decent role as a rookie.
I haven't given much thought to the other RB's from this years class but probably will have an opinion on them closer to kick off