JP was an R&B/Jazz guy, period. In the 70ies: Las Olas Brass, Tommy Strand & The Upper Hand, Wayne Cochran & C.C. Riders, Ira Sullivan, Peter Graves Orchestra, Willie 'Little Beaver' Hale, Albert Mangelsdorff, Blood, Sweat & Tears, Mitchell, et cetera - where's the fusion here?
In the 80ies the short lived Word Of Mouth Big Band, the WOM Sextet and other incarnations of that band - again, what fusion?
Re pure fusion: those six years with Weather Report earned him the fusion reputation which is not even 50% of his brief career (granted his playing can be called "fusion bass playing," whatever that is, during his Weather Report period).
Edit: the discs with Dennard and Bullock weren't his albums - those are posthumously released live recordings (in most cases audience recordings). Sorry for nitpicking.