I hate (operating) compressors. I bought a TC Spectracomp. I tried all the programmed settings I found one I liked. I never have to think about compressors now.
When it comes to playing with fingers, the accepted way is to use two fingers. This is great. However, 1 finger was actually good enough for JJ and he seemed to get around just fine. I watched a vid of that guy who had a signature P bass who is a hotshot US session bod (sorry, I cannot remember his name) who was playing with one finger and it does give a subtly different timing/groove.