I count Foley in 2016. UDFA that was draft eligible should count, IMO. Jimenez in 2013 too. I also count a small sliver of Upton and Zimmermann in 2016, since the second and third round picks were used to get them. Also with 2016, be careful counting Red Sox contributions from Schreiber, since what good does that do?
I count Barnhart for the 2019 draft, since Quintana was traded to get him. Granted, his WAR is negative.
I also count part of Meadows for this year's draft, part of E-Rod too.
On the topic of 2019, that draft has taken a lot of steps forward this year. Lipcius, Bergner, and Carpenter in particular. Brieske too.