I lot depends Deliveryman3 on how Edelman and Amendola are progressing. Bennett is in the picture, too. He's one of the TE's I would put into the top 10.
The Pats open at the Cards. I don't think Belichick wants to get in a shootout style game against the Cards with Garoppolo. It's my opinion that Belichick will look to play a conservative ball control game with more running than normal. One of the great parts of the Pats' attack is their versatility.
It wouldn't surprise me if the Cards tried to take Gronk away figuring Garoppolo has to prove he can beat them vertically.
I certainly wouldn't fault you for taking Gronk at No. 5 unless any of the Big Three WR's happen to be available. It would be a no-brainer for me to take Gronk at No. 5 if Brady were available all season. But that's not the case.