While young, the Cleveland Cavaliers will select arguably the best guard defender in the draft, The Great Barrier Thief, Dyson Daniels.
Daniels is the only player to get at least 3 spg since Alvin Robertson in 1991 (only Chris Paul and 1 other guy have at least 2.5 in any draftable season). At 6'8" he has massive size, yet also has the speed and quickness to defend the PG position. He is improving his 3 point shot as well getting up to 34% while still hitting 2's at 54.5%. Good rebounder and passer as well. So even though we haven't seen his prime yet, the defensive skill set and size is the perfect compliment to not just Mitchell, but Luka and JB also.