My question to you would be where are you finding the sound lacking, when you listen to your rig or from comments about the FOH sound.
What I'm having trouble with is removing unwanted brightness yet not losing a defined, articulate attack; and making the lows sound deep and powerful without becoming woofy or muddy.
My situation is different from yours. I don't play a "reggae gig" where I dial in that sound and don't change it. I play (mostly) original music in two different groups and change settings and technique to get a sound that best fits each song (that's the joy of my Alembic, it saves me from having to bring four different basses to a gig

). A few of the songs call for a bass sound that would usually be associated with reggae. So I'm looking for control settings on my bass that I can reach down and change in a few seconds, rather than having to adjust EQ somewhere else. And whatever I do has to work without needing adjustments at the PA.
Your suggestions are valuable! You confirmed I'm on the right track with Q off, treble cut engaged, filter set low. I thought I had to turn the bass boost on, but seeing that you usually have it off is making me rethink that; maybe that's what turns "deep" into "woofy". I'll play around more with leaving it off, and search for exactly the right filter setting (a small change can make a really big difference).