Best thing you can do is remove bass to balance the prey/predator ratio. Depending on the size of your bass the shiners may be a quick snack also. Tilapia are a good option because the adults will be large enough to survive predation and they reproduce in a similar to bluegill. That's why they are popular here if legal. Depending on your year-round water temperature, you may get the majority of a year out of them.

10 years ago, the bass and forage fish will most likely sized correctly as the bass grew but this shifted over time as bass reproduced and consumed larger prey.