I use different tools for different purposes.
As I haven't been gigging since returning to school, my use for EQ is primarily tone-shaping and speaker management. So all I need is one steep high-pass filter (to cut subharmonic thumps) and one band of parametric EQ. Lately that means an [sfx] Thumpinator and a T.C. Electronic Sustain+Parametric EQ.
If I was gigging, I would also have the following purposes:
--a notch filter (one narrow band, cut-only, semi-parametric EQ) to reduce feedback, boom, and wolf notes.
--a one-band parametric EQ pedal for fast tone changes.
--a switchable low-pass filter to roll off highs for more "vintage" tone when needed.
I haven't found a product (or combination of products) that is "perfect" for that selection of functions. There are lots of great EQ's out there though. I'm a fan of the Carl Martin Parametric preamp pedal, although it's only semi-parametric, and it's not surgical. The Empress parametric pedal gets a lot of love here, but I haven't tried it yet.