Triple RB viable strat?

Theoretically if your drafting top 3 in a ppr snake your probably getting an RB and then not picking again till around the 20th pick . The wrs available in that range aren't exactly world beaters imo ( Dez, Baldwin,DT,Cooper and Gronk) Gronk is basically a WR but too risky imo. On the other hand Rbs available in the same range are Fournette ,Miller, Gurley and Zeke/Crow if you reach a little bit. I think a combo of Bell/DJ/Shady and 2 of the 2/3 round Rbs sounds very strong and then you can pick up receivers like Landry/Edelman/Robinson/Adams around the second turn. I just think people are gona go RB heavy this year and there are alot of mid round receiver options ,i wana lock up my Rbs early. what do you guys think?