For dark warm barely overdrive, I have settled on the Bearfoot Blueberry, or for eq control and touch sensitive drive, the Xotic Bass BB Preamp. I also dig the Darkglass Vintage Deluxe but it's a different sound - kinda like running a bass amp and guitar amp in parallel.
This is the first time I've had 3 od/preamp pedals in the house that I want to keep and could happily bin the rest. But they all do something different, there is no one pedal to rule them all. Some sound better with a pick vs fingers, Jazz vs Precision, etc.