For me, the BOSS GE-7 has been great. It is a high quality product and still the price is reasonable. You can use it to shape your sound, obiously, but it also acts like a boost.
I use it to shape my tone when switching guitars between a P90 Les Paul, a humbucker/singlecoil/humbucker Ibanez RG570 and a vintage telecaster and it works great. This way I don't have to fiddle with the tone control on all my other pedals. I especially use this to take just a little top of my bright telecaster and it works great.
In conclusion: Yes, you can benefit from an EQ pedal and yes the BOSS GE-7 is a solid piece of equipment that will last a lifetime and be a vital tool in shaping your tone.