Jackie, as said above, had a unique voice from the beginning. His debut CD as a leader, from 1956 I think, is an absolute gem.

Discs 1 & 2

Yes, I realized it afterwards that it was Mingus. My mistake. I suppose I mixed them up because of the Bremen connection.

To my ears, Jackie McLean had his own "Voice" back in the 50's . I first became a serious fan with Jackie's first album as leader on the Ad Lib label, and his sideman playing on "George Wallington Quintet - Live at Cafe Bohemia'. Both were recorded in 1955.  I purchased both when they were first released on LP. Those two LPs infected me with a life long affection for the playing of Jackie McLean.