A few decisions will help narrow the field:
- active (i.e. EMG, Basslines, etc) or passive pickups
- if passive, single coil or hum canceling
- 2, 3, or 4 band preamp
- 9V or 18V (the size of the control cavity definitely comes into play)
- vintage or modern/"jazz bass on steroids" tonality
There are other considerations for sure but tackling this list will leave you with a reasonably short list of contenders.