yeah K-Def is easily one of the best producers out there, i've been a fan for years and it always bugged me how underrated he was and still is

glad you found out about him though bro!
he got tons of shit, if you like to listen to instrumental albums (which i know you do) besides "Nightshift" he got his solo debut "Willie Bo Bo 'The Fool'" which is sick and he also released two volumes in a series called "Beats From the '90s" which is unreleased beats he made in the '90s.
in the mid '90s he was one half of a duo called Real Live and in 1996 they released "The Turnaround: A Long Awaited Drama" which he fully produced. the MC's name was Larry-O. it's a lost classic and out of print but you should definitely download. vintage boom bap masterpiece + it even has a posse cut with Ghostface, Killa Sin, Cappadonna, Lord Tariq and Larry O.
he was Marley Marl's partner in beats n did most of Tragedy's second album which is unbelivable.