On the surface or just under it, I like the Minnow Crease Fly sizes 4 & 6. But it is more of an all around minnow fly since I've caught Largemouth Bass, Bluegill, Shellcracker, Specks, and others. A minnow imitation can be hard to beat when that is what the fish are keying in on and sometimes even when they are not. Other than that, a leggy yellow popper or a yellow foam bug in various sizes.
For subsurface, I like a size six black Woolly Bugger, a size eight Crappie Candy, or a size eight Cypert's Mylar Minnow at times. Lately I've had luck with Terry Wilson's white Mini Minnie though. Again, minnow type action flies especially for LMB. I also like to use the size eight Dixie Bug occasionally for LMB, not just for bream as it is kind of a quasi-dragonfly nymph type attractor fly. Also a size ten black Marabou Damsel Nymph.