This sounds like a classic case of "more me". I would start again lowering the stage volume to give the players what they need.
IMHO the most classic mistake people make with monitors is giving the performers what they ask for, not what they necessarily need, more often than not there is a huge difference. Obviously I don't know exactly what you are dealing with in terms of instruments and vocalists, however, as a quick pointer, vocals are going to be the most important, add in the instruments that they need to pitch against (probably guitars and keys). Make sure that there is enough of these for the (guitarists and keyboard players) to hear their parts of course considering where they are standing in relationship to which monitors. With this type of monitoring situation I would keep the drums totally out of the monitors. If bass is just off the side of the stage, you might not even need any of this in the monitors.
Front monitors (assuming singers are standing front and centre) should have little of anything else in them unless they are also playing or need a little more to pitch against. All the above makes a lot of assumptions about what you may or may not be doing, but good monitoring is as much about the planning beforhand.
Good luck!