FM's guide to mastering: How to use dynamic EQ - YouTube (brainworx dynEQ)
Dynamic EQ - Harsh Vocal Treatment using stock plugins - YouTube (build your own dynamic EQ from basic principles)
Cubase tutorial Dynamic Equalization - YouTube (3 scenarios - GlissEQ (De-essing … what settings?), Melda.
Mix Rescue: Imprint (freeware iq4, towards the end. Not sure, but it might be 32-bit only)
Having said all that, as of now, I just listen for harsh spots, figure out where they are (the old fashioned “boost-and-listen” way, but I might use Curve-Eq and see about that), and then automate EQ notches at those points.
Might trial one of the others (or build my own like in the steinberg forum link) and see if it’s any better …