You forget to include Mackensie Alexander on that list...Retaining Josh Boyer was the worst move in hindsight but to me that's not a fair assessment. Our bonehead owner tampering for Tom Brady and Sean Payton probably takes the cake.
Dishonorable mentions: Franchising Mike Gesicki (love the player, just not a fit in the offense), signing Trey Flowers and Eric Fisher and getting nothing in return from either of them.