If we are loading up on receivers in round one then I think Pitts plus one of the 3 Blue chips (Chase/Smith and Waddle) is a better combo. I have a hard time imagining that all three of those will be gone by 18 but if that's in doubt trade back from 3 and up from 18 will secure both players. Williams in the 2nd round is definitely a target but I think you can get a comparable skill set for Bateman in later picks, here's what I would do:
3. Pitts
18. Smith (most likely to drop because of the frame concerns)
36. Williams (unless Harris is there)
50. Dickerson (if he passes health checks, if not Humphrey or Radunz)
81. Eskridge (if there, if not Rodgers/Atwell/E Moore/ R Moore/Wallace/St. Brown)
We aren't the Panthers though and totally unlikely to stack up on one side of the ball, so I'm expecting 18 or 36 or both to be D players. Which means we have to trade back a bit for more capital.