Try using multiband saturation instead of EQ

Multiband saturation can do a similar thing as EQ boosts, but as a bonus, it adds harmonic content and density as well.¹

If you’re boosting the low-end, but it gets boomy or muddy before you get the weight you want, or if you’re boosting the high-end, but it gets harsh before you get the airiness you want, this may be a sign to reach for some saturation on those bands.²

Mike Senior recommends this approach too in Mixing Secrets for the Small Studio.

Parallel distortion can be used for a similar effect. You can use filters to focus the distortion on certain frequencies.³

I like using Saturn 2 as an exciter. SlickEQ GE does something similar by adding harmonics as it boosts. Volcano 3 can add saturation on its bands too.