Most everything with a level knob is a clean boost when their other knobs are set flat or disengaged.
The Mooer Radar has a 5 band fully parametric EQ. You can set each filter to exactly the frequency and bandwidth you want. It is marketed for amp sim and cab sim, but I just turn those off and only use the EQ when not on headphones. The master level has plenty of boost.
I couldn’t find another EQ that had the frequencies where I wanted them. Most are designed on standard EQ centers rather than instrument specific centers. Unless you go with a preamp pedal that has 3-4 bass friendly EQ centers that you may or may not like. On that road I like the ToneHammer because it has a sweepable mid control that I can put where I want.