I like Devers, Groome, and Kopech, but these are are at least 3+ year away.
But I'm not worried, with all their young players, they can find free agents to fill out holes on their rosters.
By this time next year, the Red Sox will be in the 20s once Moncada and Benintendi are longer prospects. It's great having over half of the everyday players under 25.