I do NOT want a RB at #52. There is tremendous depth at RB and there will be good ones available in R 3-5.
In fact I prefer a trade down to recoup some picks this year or next since the team is short on draft capital.
But if they do use the pick I would say in no particular order:
TE's
Washington
LaPorta
LB's:
Campbell
Simpson
DE's
Morris
K White
OL:
Schmitz
Wypler
Tippman
Avila
CB's:
Forbes
G Williams
There should be some real quality at a position of need to choose from.
I like the idea of drafting a C like Schmitz and then moving Williams back to LG, or taking a strong OG like Avila and plugging him in between Williams and Armstead.
A legit CB who is good in zone would be a good addition to Fangio's Defense(I Love saying that).
The same is true of a strong ILB like Campbell or Simpson who are very different LB's but both would be upgrades to the team's woeful LB corps.
And while not a need an edge setting DE like Morris or White would be great value and either could eventually replace Ogbah(who the Defense missed badly when he went down).