My bass must collab with kick and melody. It cannot be arbitrary. The grunt is often in the arrangement.
So much of my bass-line comes from a collab (live) performer who can link melody with the kick intuitively (Danny Danzi, Roger Davis have been invaluable to me).
Producer samples (like producerloops.com) and Beatscape (Sonar) offer some grunty sync kick-bass-chords/melodies.
The other 50%; I fake it with Trilogy ... like a farty-trumpet-bass :):):)
UAD bass enhancer 'VOG' (voice of god) ... has its place for hip-hop bass (5-6 songs for me).
But again (as stressed by Bat and you-all), a seasoned live bass-player knows how to make it grunt ... in any genre I believe.