When it comes to jazz electric bass, there is Jaco. And then there is an empty space. The only person that comes even near is Marcus Miller. The only thing that keeps miller in a second place is that fact that unlike Jaco, he is not completely insane, but you can really hold it against him.
He is the groove master. Everything I know about playing straight bass with a jazzy funk I learnt from him. And boy did he know what he was doing, sitting on that beat like a rodeo rider, no matter how it goes wild, he is right there on the beat, right there to do something that you didn’t expect.