Don't think so. You want your rig and FOH to have the same EQ, so what you hear is the same as what goes out front.
Which is hard, since you have no idea how the FOH system is EQ'd. Chances are it's not flat though, since that's not generally what people like, and I say that from from decades of running live sound professionally. Typically PAs have that sexy exaggerated low end and hyped pseudo-detailed high end, like your car stereo probably has. A quality PA should have any narrow anomalies ironed out, so it's flat in that sense, but the overall curve is probably something like that, but unknowable to you.
Which says a couple things to me...
- EQ-ing out any narrow peaks and valleys IS worthwhile
- EQ your rig and presets to they make you happy onstage, don't worry about the rest, and let the house sound person do what they do