▁jazz ▁mus icians ▁including ▁D iz zy ▁G illes pie , ▁Mil es ▁Davis , ▁Duke ▁Ell ington ▁and ▁Count ▁Bas ie , ▁and ▁even ▁did ▁a ▁du et ▁with ▁Bill ie ▁Hol iday . ▁He ▁worked ▁as ▁a ▁musical ▁director ▁for ▁many ▁acts ▁such ▁as ▁D iana ▁Ross , ▁both ▁with ▁and ▁without ▁The ▁Sup rem es , ▁the ▁Four ▁T ops , ▁The ▁T empt ations , ▁Ste vie ▁Wonder , ▁The ▁Jackson ▁ 5 , ▁Glad ys ▁Knight , ▁Ken i ▁Bur ke ▁and ▁L inda ▁Cl iff ord . ▁ ▁As key ▁played ▁as ▁a ▁jazz ▁tr ump eter ▁for ▁almost ▁ 2 5 ▁years ▁before ▁arriv ing ▁at ▁Mot own ▁Records ▁to ▁work ▁as ▁a ▁musical ▁director , ▁producer , ▁song writer ▁and ▁musical ▁arr anger ▁for ▁such ▁artists ▁as ▁Billy ▁E ck st ine , ▁Glad ys ▁Knight , ▁The ▁T empt ations , ▁The ▁Sup rem es , ▁Mar tha ▁Re e ves ▁and ▁The ▁V and ell as , ▁Mar vin ▁G aye ▁and ▁Ste vie ▁Wonder , ▁The ▁Jackson ▁ 5 ▁and ▁The ▁F unk ▁Brothers . ▁As key ▁was ▁also ▁part ▁of ▁Mot own ' s ▁Art ists ▁Development ▁crew ▁that ▁included ▁Max ine ▁Pow ell , ▁Maurice ▁King , ▁Ch olly ▁At kins ▁and ▁Har vey ▁Fu qua . ▁ ▁When ▁D iana ▁Ross ▁became ▁a ▁solo ▁perform er , ▁she ▁h ired ▁As key ▁to ▁be ▁her ▁Musical ▁Director . ▁He ▁worked ▁with ▁her ▁for ▁ 1 0 ▁years ▁and ▁wrote