According to PFF, the Indianapolis Colts’ Chris Ballard is the league’s 3rd best general manager in ‘draft-day trades’:
3. Chris Ballard, Indianapolis Colts
Best Trade Down: Sam Darnold @ pick 3 (gained 2626 points, 2nd overall pick)
Worst Trade Up: Khari Willis @ pick 109 (lost 428 points, 160th overall pick)
Explanation: Ballard’s overall score is tremendously boosted by the Darnold trade, but even if you remove trades involving QBs, which have their own market, he still ends up in the top five.