The good ones:
Lamar, Andrews, Hollywood, Orlando Brown, Dobbins. Got those five from the draft in a 3 year period.
The bad ones:
Hurst (probably wasn't really bad, and netted us quality players in a trade back)
Duvernay
Boykin
Phillips
Note that was in addition to quality players who were already here before 2018, which included Stanley and Boyle.
If we went back and looked at the 2017 roster:
WR: Maclin, Wallace, Perriman, Moore
TE: Boyle, Ben Watson, Escobar
OL: Stanley, Jensen, Yanda (the good one's), Hurst, Skura, Howard
RB: Alex Collins, Terrance West, Buck Allen
So like yeah, the Oline was probably better on the interior than it was early in Lamar's tenure, but we certainly upgraded massively at RT, TE, arguably WR, and 1000% at RB within 1-2 years of Lamar being drafted. And most of that was through the draft.