I have three that I use, depending on the setting
For most dep jobs requiring a clean bass tone I use an MXR m80
for more Rock gigs with a capital R its the Steve Harris pre from Tech 21
and for slightly more old school, I have the Laney Digbeth.
There is very little to choose between the laney and the t21 I feel at the moment, and they could probably cover each other if needed.