The examples given by Teasing the Korean are sessions from 1962 and later, which I wouldn't call early stereo recordings.
Maybe the recordings Reinier means are the more experimental stereo recordings from the mid 50's, like the 1955 live session in the Tristano/Konitz/Marsh box set, where the stereo effect seems rather diffuse.
One of the greatest sounding early stereo Atlantic sessions is "Modern Jazz Quartet at the Music Inn, Vol. 2" from 1958. But there are other sessions with Coltrane, Mingus or the MJQ which don't sound nearly as good, what could also be due the the condition of the master tape.