The older Dumbo was not black friendly, showing them being slaves toil to offensive lyrics. Dumbo did have have a few black voice actors the crows, Hall Johnson as Deacon Crow, James Baskett as Fats Crow and Nick Stewart as Specks Crow. All the crows are voiced by people with black backgrounds
"The crows and musical number pay homage to racist minstrel shows, where white performers with blackened faces and tattered clothing imitated and ridiculed enslaved Africans on Southern plantations. The leader of the group in Dumbo is Jim Crow, which shares the name of laws that enforced racial segregation in the Southern United States. In "The Song of the Roustabouts," faceless Black workers toil away to offensive lyrics like "When we get our pay, we throw our money all away." - Disney