I dug back a little farther a few weeks ago (nothing better to do during a blizzard).
Here's a little snapshot of Snead's drafts with the Rams.

7 Snead drafts
49 original draft slots - the slots before any deals/trades.
5 comp picks - I believe all not tradeable.

Total number of players drafted - 63.
Number of players taken at original draft slot - 17.
-Number over the last 3 years (21 slots) - 4.
-Last year - 0 (or 1 if you count Obo)
- Not counting 2018 5th pick that was reacquired from Denver.
- Not counting 2016 5th used for Isiah Battle supplemental pick.
- Not counting comp picks

Players taken in first round - 5
Number taken at original 1st round slot - 2. Gurley and Donald.

Snead drafted players still on roster - 25.
Snead drafted players on roster from last two drafts - 17 of 19 picks
Snead drafted players on roster from 2012-2016 drafts - 8 of 44 picks. Brockers, Zuerlein, Donald, Gurley, Havenstien, Goff, Higbee, Thomas .

Players acquired for picks. 8
Players traded for picks. 7
Not exactly sure on this, but this is direct player for picks moves like the Watson, Cooks and Ogletree deals. Not trades like the RG3 or Goff deals. Not sure I got all of them. I was going to look into trade-ups and trade-downs, just haven't had time.

Not guaranteeing this is 100% accurate, but it's close.