I would say one of Harper, Schwarber and or Castellanos will be filling 1B for the next few years. Schwarber will be here for 2 more seasons and should get moved there next season, Harper will probably end up at 1B this year and then after Schwarber. Castellanos is also a black hole as an OF and should fill one of the 1B/DH tiles for next season.
Bohm is probably somewhere in that mess at 1B also. If Hall can hit ML pitching he also factors in.
I would say it will be a long time before we would want to have a young 1B. To me that is the one position we should avoid in the upper part of the draft because our team is probably blocked at 1B for years to come.