Try using a 12db BandPass filter with the LFO modulating the frequency cuttoff. That will give you some great wobble. A BP filter will give you more of a pronounced wobble effect. You will have to layer a sine underneath it to get the low end back. Then the best thing you can do to make your life easier is to map the LFO rate to be modulated by the velocity of your note. More velocity, more wobble. Less velocity... you get it. Makes it much easier to automate because when you are editing you're dealing with straight midi note data and not a CC message or other data to control your LFO automation. Also if you are using a keyboard controller it makes writing the bass line much quicker.