All just my personal opinion
Concert review, Till Fellner, Bernard Haitink / Tonhalle Orchestra @ Tonhalle Maag, Zurich, 2018-09-19 — Mozart: Piano Concerto No.22 in E♭ major, K.482; Bruckner: Symphony No.7 in E major, WAB 107
Concert review, Maria João Pires, Bernard Haitink / Tonhalle Orchestra, Zurich, Tonhalle Maag, 2017-12-20 — Mozart: Piano Concerto No.27 in B♭ major, K.595; Bruckner: Symphony No.4 in E♭ major, “Romantic”
Concert review, Lucerne Festival: Christian Gerhaher, Bernard Haitink / Chamber Orchestra of Europe @ KKL Lucerne, 2017-08-15 — Mozart: Symphony No.35 in D major, K.385, “Haffner”; Mahler: Rückert Lieder; Mozart: Symphony No.38 in D major, K.504, “Prague”
Concert review — Tonhalle Zurich, 2016-12-07: Sir András Schiff, Bernard Haitink and the Tonhalle Orchestra performing Beethoven (Piano Concerto No.5 in E♭ major, op.73, “Emperor”) and Bruckner (Symphony No.9 in D minor, WAB 109)
Concert Review, Lucerne Festival / KKL Lucerne, 2016-09-04: Isabelle Faust & Bernard Haitink / Chamber Orchestra of Europe — Antonín Dvořák: Holoubek (The Wild Dove), op.110; Violin Concerto in A minor, op.53; Symphony No.7 in D minor, op.70
Mahler: Symphony No.5 — comparing recordings with the following artists: Walter/NYPO (1947), Haitink/Concertgebouw (1970), Solti/Chicago SO (1970), Abravanel/Utah SO (1974), Sinopoli/Philharmonia (1985), Bernstein/VPO (1987), Abbado/BPO (1993), Zinman/TOZ (2007)