I've never found the need to fiddle with EQ at a gig, but for the last 30 years I've been using programmable multi-effects where each song has it own set of patches that have been carefully crafted to produce the right sound and sit the bass in the right pace in the mix of other instruments.
If that sound needs some additional EQ FoH to compensate for the room (although there are limits as to how useful this is as room problems are both frequency and time based and trying to apply a frequency-only fix only works in certain areas and can actually make the sound worse in others) that is the domain of the PA engineer. On stage it would be nice to have a perfect sound, but until my band move to in-ears, I'll settle for being able to tell that I am in time and in tune with the rest of the band and not be so precious about it.
I'm also of the opinion that over all the whole band performance is better, if I play the song with slightly the wrong sound, than if I stop playing to fiddle with the EQ.