Could try GRM Tools Spectral Transform's Contrast plug. If you set it maxxed out, it'll flatline your EQ as much as is possible for the sample you're using (i.e. it'll turn your sample into a wall'o'sound across the spectrum as much as it can, sort of like an EQ version of compression, but not recommended if you want the result to sound clean). You can then carve away at the thing with another EQ plug down the chain.