for the longest, dr. dre was the goat in my opinion but my opinion on that changed a little while back (too many other cooks in the kitchen when it came to his production work over time for him to be considered the goat and yes all producers have some type of help at some point or other but with dre, it just has always seemed like more than most, at least to me anyway). but i will say, dre's crisp and clear sound is truly somethin' else. his mixin' is brilliant.
rza was always in that number 2 slot, right behind dre imo. dre had done the n.w.a. albums, eazy's 1st album, d.o.c.'s, the chronic, doggystyle then came rza with the wu's 36 chambers and a shyt load of the 1st wave of wu solo members albums and all in 4 years, 5 if you count when they really started before they made their debut. but like dre, rza had this mindblowin' run of production work that forever changed hip hop
then there was premier who for me was always in that number 3 spot. while both dre and rza trail blazed durin' their runs, premier did too yet unlike them, he was able to sustain a far better run and not burn out. plus, he kept gettin' better, even into the 2000s and beyond. premier to me, his sound has always been "hip hop", like just that head noddin' shyt that you ain't even gotta hear a nikka rhymin' over to really enjoy it, that's just how great and classic his beats and production work is. i've come to realize that he's the only producer who's beats and production i can enjoy listenin' all of their instrumentals without hearin' a soul rappin' over them. don't get me wrong, i love quik's work and i love dilla's work but there isn't single dj premier instrumental that i don't love. sometimes when you hear instrumentals, there are some instrumentals that can get borin' after a while if the beat doesn't really go anywhere and an mc rappin' over it is missin' but not with dj premier's beats or at least not in my opinion
but with his production from his gang starr run, to his contributions to nas' illmatic/stillmatic, to his production work on jeru's wrath of the math and the sun rises in the east albums, biggie's songs, the group home's livin' proof album, jigga's shyt, m.o.p., big shug, d'angelo, christina aguilera, kanye's shyt (remember ye' even got his help with "i wonder" for scratches, and "classic" remix) his remixes and then his most recent work with royce da 5'9 too

and his remix for lion babe's "wonder woman" song (and it could be argued that his contribution on dre's "compton" album is by far is the greatest thing bout the whole damn album

then again i wouldn't even say it's an argument

)
premier got a good amount of officially released unreleased music too, random instrumental albums (that "beats collected dust series" vol. 1 and vol. 2)
i look at it like this too, both dre and rza fell off some years ago while premier is still puttin' music with really really good quality after over 20 some years
dj premier = the goat
then everyone else comes in 2nd, 3rd, 4th, 5th etc... place
