For me it was "Out To Lunch" and the live concert in I think 64, with Mingus. He just shone. A few years back I did an exhibition of jazz portraits at the now defunct Cafe Stritch where he was one of the bigger prominent works: https://www.deviantart.com/zeruch/art/eric-dolphy-v5-1936648...

I think its the phrasing that just does it for me.