When it comes to bass players you just can’t get much better than Jaco Pastorius.

Jaco Pastorius is one of the most important bass players of all time. He’s certainly one of the most influential.

I had thought about including this under progressive rock because of Jerry Goodman's inclusion here. The thing is, it's really mostly pure jazz - and not even fusion, really.

Billy Cobham is usually referred to as contemporary jazz or jazz/fusion artist, but he also crossed over into prog territory and it appears it has not left him after all these years.