If you're set on bluegill, then you must stock LMB, period.
If you want HSB, then hybrid bluegill is the obvious option. Similar tasting as BG. more aggressive and harder fighting. WILL NOT revert back to green sunfish. Some offspring will look like parents, some more like bluegill and some more like gsf. Nearly all their offspring will be consumed by the hsb. Plan on stocking more as fished out. Redear added for reducing grubs and as a pure lepomis species. In this scenario, I dont see a problem with a few CC to help control the panfish offspring. Not too many, and fish them out after 12-18 months, BUT, I would wait to see if you really want or need them. 8-10" CC can be obtained easily and cheap for stocking later.
You mentioned that the pond is across the road. Is it a paved road. If not, run a 3/4 semi-rigid air line under the road in a trench. If paved, may still be able to push one in a conduit. Mr. Cody has mentioned a few times the importance of aeration, BUT you have time, probably summer after next to get this done as the carrying capacity increases. You will not have wind in hot summer at night when you need aeration the most. You have time to look into a small solar system. Enough to digest for now.
