I highly doubt that Gesicki is available if we trade back (I think he's a definite first rounder), but I don't think he's the right fit either (as incredibly talented as he is). I love Goedert. I also think Hayden Hurst would be a tremendous addition in the late 2nd. I'm not that high on Carter because I don't see him as a premier pass rusher. I see him as more of a do-it-all type LB, and I think Samson already has that sort of ability.
Personally, if we were to trade back to the early 2nd, I'd look into a guy like Sam Hubbard to play OLB or Rashaan Evans to play ILB.