Try a size 4 Clouser Minnow about two inches long in either olive over white or chartreuse over white.
They'll also strike "tube-jig" flies in the same sizes and colors along with blue and white. And a size 8 yellow Marabou Muddler is a good choice at times, especially when the fish are shallow and you want your fly to sink a little slower.
Bon chance.
Pete