On the Bass.
I once saw a YouTube video on optimal settings, on the amp and a Les Paul guitar, to get the best Blues sound out of a Les Paul and that opened my eyes a lot to tone shaping at both the guitar and amp end of things. I have looked and cannot find that video any more.
It is amazing how you can change the sound by learning about the different controls both on your instrument and amp, and how they interact. Edited-See my post #20 for the link
I have never in 40+ years of playing guitar relied on pedals to shape my tone and have never had an issue. The only pedals I own are: 1 - In-line tuner (which I only purchased several months ago, when I took up the Bass, because my headstock tuner did not care for the lower Bass frequencies) , 2 - 99 Channel looper (BossRC30), and 3 - a Blues Overdrive that I have only used on guitar (so far). Not sure if it will even work on lower frequencies but that is a topic for a different thread.