There is not one pedal that I’ve ever played that does filthy grind better than the rat tail. It’s amazing for that stuff. It’s very unique but also, for me, won’t fit everything I do. So it’s not on my board atm. But it probaly will he again someday.
The other ones I use to do some serious grinding is the MBD into the X7. Oh man is it good. Then I use my Longsword for a type of rat sound just a little more refined and transparent. Fuzz has always been a tough one for me. I’ve alwaya struggled with fitting it somewhere. I used it in my old band a bit. But this newer project I’ve been playing in there just isn’t a place for bass fuzz. However, that project disbanded this past few days. So me and the BL (rhythm guitar and lead vocal) are starting something new. So who knows, maybe fuzz and my rat tail will find their way back on