Some of the best midrange I've heard is by Fritz Heiler's speakers. His Carbon 7s have a slightly mellower roll off on the top end than the Carreras (beryllium tweeter, there) but both speakers have unexpectedly strong bass and a glorious, intimate, human mid-range. I've compared them to a wide range of others — Focal, Martin Logan, Klipsch, Paradigm and more. The midrange is always the standout aspect.
Video review, here: https://youtu.be/Hn3h3Tk6PzE
Audiogon reviews:
1. Carrera: https://forum.audiogon.com/discussions/review-fritz-heiler-s-carrera-be-bookshelf-speakers
2. Carbon 7 SE Mk 2: https://forum.audiogon.com/discussions/review-fritz-heiler-s-carbon-7-se-mk-2-bookshelf-speakers
Video review, here: https://youtu.be/Hn3h3Tk6PzE
Audiogon reviews:
1. Carrera: https://forum.audiogon.com/discussions/review-fritz-heiler-s-carrera-be-bookshelf-speakers
2. Carbon 7 SE Mk 2: https://forum.audiogon.com/discussions/review-fritz-heiler-s-carbon-7-se-mk-2-bookshelf-speakers