An EQ pedal could be used as a boost, too, as could a compressor, but each with their own limitations and drawbacks.
The Boss EQ pedal could be left flat and then only the output signal could be boosted via the level control and you could tweak out any excessive frequencies, too, but the circuit may not give the cleanest, fullest boost.
A compressor can boost the signal as well, but it will tend to bring the noise floor up, too, and would not be a clean boost at all.