CJ, are you aware that Nate Herman regularly stocks both pike and tiger muskie in the ponds and lakes he manages? He's one of the most respected pond managers in the country and on this site, and has vastly more experience than you do. He probably wouldn't be doing it if it were a bad thing. Also, you may be familiar with Bremer pond, which I believe was recently or is about to be featured in Pond Boss as an exemplary pond? It's ten acres, has northern pike, and has produced LMB over eight pounds and bluegill over 10".
Lastly, bluegill do not "always" outcompete green sunfish. They had not done so in the pond I worked with that was overrun with GSF and had been for years, as bluegill had been almost eliminated by the GSF before I stocked bass and pike; and, quite obviously, they have not been outcompeted by bluegill in this pond in question in MO, and will not be unless corrective action is taken.