Not sure which wrasses you have but I'll go on the assumption that the rainbow is T. lucasanum and the banana is T. lutescens.
The rainbow is probably OK as his adult size is small enough, although it is still hit and miss. As for the banana, the shrimp won't stand a chance once this fish grows and nears his adult size of 11+".
BTW the shrimp will stand a much better chance if they are in your system before you add the wrasses.