I agree, even a fish that is not overly prolific like RES still needs some control of their numbers. If you stock them into a smaller pond, say 1/4 or 1/3 of an acre. Just one LMB may be all that is needed.
No need to stock FHM of GSH. Just the RES and the lone LMB. When the LMB gets over 12" or so, remove it and replace with another 6" or so LMB.
My RES pulled off a good spawn last year, I would be worried if there was only one LMB in the pond to control their numbers. Last years hatch vary in size from 3/4" to 3" +.