Agreed. I personally shoot for the best tone for FOH/console, then make adjustments in the playback system (IEM or wedges). My IEMs ( Sensaphonic dual drivers & Shure 425s) lose low end compared to most playback systems, which can be compensated for on the monitor console by cutting some top end to the IEMs, so it doesn't affect what is happening in the mains..
the other "more involved" way to do this on Helix/HX could be to have separate sends with different EQing to FOH and Monitors, assuming you don't already have those outputs assigned to other needs.