I would take a chance with Gronk only because none of the rest stand out as that great. However, if you don't feel comfortable with Gronk, because it is a little risky, I would take Cobb over the rest.
I drink because of the 1998 NFC championship game.
12 team big $$$ non PPR league - QB RB RB WR WR TE D K
RB: Murray, Matthews, R.Bush, D. Brown
WR: Julio Jones, Colston, VJax, Garcon
TE: Witten, Gresham