Have to dump one of my TEs (Gronk or Graham)

12 Team ppr
I drafted these two guys with my first two picks (11 and 14) because I knew I could ride with one in my flex. But now I find myself with a little depth at RB after I traded RG3 for F Gore and I need to play a RB at my Flex. I am big need of a WR2.
My Team:
QB-P Manning
RB1-T Rich
RB2-Spiller
WR1-AJ Green
WR2- Britt, A Roberts, T Young (Basically a coin flip each week)
TE- Graham
Flex- Gronk

I obv need to target a WR to go with Green and I really don't want to give up one of my 3 RBs for it.
So, do I give up Gronk or Graham? And what kind of WR should I expect to get in return?

Teams that have TE issues and their Receivers:
Team 1- Miles A, D Jackson, S Smith Car, J Gordon
Team 2- H Nicks, Colston, B Lloyd, S Rice
Team 3- M Wallace, T Smith, D Moore, R Cobb
Team 4- R White, Steve Johnson, L Moore, K Wright