Stu Hamm - best checked out on his 'Radio free Albemuth' - his covers of 2 classical pieces are well tasty
Victor Wooten - top man, but best heard on Flecktones albums rather than his solo stuff
Mark King - I'd recommened a decent Level 42 compilation. amazing speedy thumb technique
Larry Graham - the man who invented slap bass. Cut his teeth with Sly and the Family Stone but I reckon his best stuff was with Graham Central Station. Check out the recent anthology. Amazing chops.
Stanley Clarke - I rate him higher than Jaco.the grandaddy of bass virtuosity. 'School days' is the classic album and the title track's his most famous piece. Check out the long version on 'Live at the Greek'.
there's a guy called Dan Glenn who's done a lot of session work. Not sure what id recommend. Same for Bill Dickens.
Drummers - i play drums myself and get more inpiration from jazz and fusion players rather than rock players. Dennis Chambers certainly features in my top 10. Others you chould check out are
Jack de Johnette
Omar Hakim
Lenny White and Tony Williams - check out their work with 'Return to Forever ' for the unitiated this was probably the first supergroup - Ali Meola, Chick Corea and Stanley Clarke.
Billy Cobham - one of the few drummers who are band leaders. 'Spectrum's his best album but 'Anthology' is also essential for serious drummers as is 'Live at the Greek' with Stanley Clarke and Larry Carlton.