Tiger Muskie would do a better job of thinning out the bluegill, and would also thin the small bass so the remaining bass grow better. A recent issue of Pond Boss mentioned this approach in the context of thinning overcrowded bass while keeping bluegill thinned as well. You have an unusual situation in that it sounds like both species are overcrowded; that's more thinning that needs to be done, and esox are the champion thinners.
If you're feeding pellet food or are planning on doing so, the HSB will readily eat it, which will lessen their effectiveness thinning the bluegill and bass as well. Tiger muskie on the other hand don't eat pellet food. You would only need two or so 12" tiger muskie per acre.
