Pro-Q2 is superb for controlled EQing.
For a start, Fabfilter's interfaces are fantastic - you get a great visualisation of what you're doing to the sound.
Pro-Q2 gives you all sorts of options in terms of EQ curves...
If all it had was its "basic" EQing features with Mid-Side processing it'd still be my favourite EQ for sculpting sound, but it's also got lots of other stuff I haven't even got into yet (frequency-spectrum matching, linear phase EQing etc)... it's very, very good. Not super-colourful, but ridiculously useful.
For filters... I like a bit of dirt so I personally prefer Sugarbytes WOW2 to Volcano, because WOW is immediately coloured.
Saturn's great too: it's not the only multi-band saturator/distortion plug on the market, but I'm starting to play with features like the band-specific dynamics, and tuned feedback, and again it's got an immaculate user interface.