HSB will eat anything they can fit in their mouth - so they will readily prey on your smaller bluegill, redear and the minnows

Have you planned on stocking any other predator fish? HSB will not be able to keep up with bluegill on their own unless you were very predator heavy and were looking to have a healthy population of 6" plus size BG. At some point the HSB will die off, and the BG will overpopulate very quickly - you will either have to continuously stock HSB or another predator to keep the BG at the size range you target for your pond goals. HSB are opportunistic but generally cruise open water at mid depths looking to ambush schools of baitfish - not exactly perfect bluegill predators. LMB are typically what people lean on for a primary bluegill predator as they can eat large amounts of bluegills in several size classes - basically anything that can fit in their mouths There is nothing wrong with diversifying your predators, however.

What are you goals for the pond? How much work do you want to put in to reach those goals?