i too like the sentence :
It may not storm the gates of heaven like J.S. Bach, but it paves the streets leading to those gates,
It resonates with my (short) impressions of his work -- which include the oboe sonatas (Holliger, I agree of course).
Sorry to join in so late, but I would like to add to the discussion on D Barenboim: I propose to rephrase the question as,
DB, a conductor or a pianist?
I have heard DB both as a conductor (Elgar, Brahms, etc) and pianist (Brahms 1, 7 other recordings).
My response is, definitely much better pianist than conductor... I am not a music professional so mine is an amateurish approach.
My experience with the discussion, re maestros, resonates with the thoughts expressed above, especially regarding Furt & Celi & T... to add a short comment, both F & C succeed in touching the listener's inner soul and, by their conducting, let out the humanity hidden in many compositions (many examples; Celi: Mozart Requiem, Furt: Beethoven 3 recording of 1944 (?) in Vienna...)
In this respect, trying to emulate Furt, for example, is a limitation in itself, in that
a) we already have Furtwangler, the original item😉
b) following endlessly in someone else's footsteps often leads one away from discovering their own path
Whereas, as a pianist, DB played an exciting /interesting Brahms under Celibidache & recently under Sir Simon Rattle. (Although for this piece I would prefer Gilels)
Regards