CB and S are by far the deepest positions in FA this year. Some really good young guys available. These ones got my eye:
CBs
Trumaine Johnson (28)
Malcolm Butler (28)
E.J. Gaines (26)
Kyle Fuller (26)
Bashaud Breeland (26)
Of all these guys I'd target Fuller, and Breeland. I wouldn't have a problem with signing any 2 guys from this list. I think Breeland is a real up-and-comer.
Safeties
Lamarcus Joyner (27)
Kenny Vaccaro (27)
Eric Reid (26)
Tre Boston (25)
Vaccaro would be awesome. Tre Boston is poised for a leap IMO.
Gruden's going to have to be aggressive in FA with all 4 of these positions, as far as I'm concerned. I have no faith in Karl Joseph, and absolutely ZERO in any of our CBs.