I'm going with AJ Green.
I wanted to homer-out and say Dez, but I think there are too many weapons on offense for him to regularly eclipse 85+ receptions a year.
Sort of the same issue with Hakeem Nicks, and Jeremy Maclin. While I think Maclin will emerge as the #1 receiver on that team, I still see a lot of dink and dunk passes to backs out the backfield.
Crabtree is a possiblity, but he's limited in the QB department - although you could say the same thing for Green. That said, I like Dalton's upside, and they have the potential to grow together.
The receiver I think is least likely to hold this distinction is Julio Jones. I don't think he'll live up to his potential, and his career will be marred by drops.