Are there any works you wish certain great conductors had recorded but never did? For example,I wish that Solti had recorded Schoenberg's Gurrelieder and Pelleas &Melisande,for example,or perhaps the Nielsen symphonies, two of which he performed live with the Chicago symphony but never recorded. I've always considered his 70s Symphonie Fantastique one of the most exiting recordings of this work I've ever heard, and would have liked to here possibly the Requiem and other works. His Damnation of Faust is also outstanding. For Liszt,I wish he had recorded more of the symphonic poems. For operas,perhaps Il Trovatore, La Forza Del Destino and Macbeth of Verdi, and Turandot of Puccini( There is a live CD from Cologne of this but I haven't heard it), or perhaps Les Troyens, etc
Or all the Mahler symphonies by Karajan. He made two recordings of the 9th,one live and one studio,and the 4th,5th and 6th. Or more of the Nielsen symphonies; he made a memorable one of the 4th for DG. Or Elektra and a studio Frau Ohne Schatten. (There is a heavily cut live recording from Vienna). There is a live Tannhauser from Vienna also, but I wish he had made a studio version.
For some reason,he never recorded the underrated 3rd symphony of Sibelius.He of course did the other six. It would also have been interesting to hear more Shostakovich from Karajan; he made two recordings of the 10th.
I also wish that Mackerras had gotten a chance to record some of the Wagner operas,but unfortunately his recent death makes this impossible. And it's unfortunate that Kubelik never got a chance to record any of Janacek's operas,or those of Smetanan and Dvorak.
It would also have been wonderful if Fritz Reiner had left complete sets of the Beethoven and Brahms symphonies, and complete recordings of Salome,Elektra,and Der Rosenkavalier,or possibly Wagner. His father Erich had a much wider repertoire but unfortunately too little of it was recorded.
Carlos Kleiber unfortunately left a handful of commercial studio recordings,which have recently been released as a set by DG. If only he had recorded Elektra,Der Rosenkavalier,Otello, and others in the studio,and more Wagner,as well as more Beethoven and Brahms symphonies, or Richard Strauss tone poems.
If only Stokowski had recorded more Mahler than the 2nd symphony or a studio version of the 8th, and perhaps the Tchaikovsky Manfred symphony.
Or more of the Mahler and Bruckner symphonies by Klemperer; he never recorded the first three of Bruckner or 1,3,5,6,and 8 of Mahler. Or more complete Wagner operas such as Lohengrin,Tristan and Meistersinger; he recorded only the Dutchman, but there was I believe a live Lohengrin from Budapest.
If only Leonard Bernstein had left a complete Mahler 10th in the Cooke version; he was also planning to record Britten's Peter Grimes complete before his death, and more Bruckner; there are only a studio 9th from CBS with the New York Phil,and a live DG on with the VPO which was one of his last performances, and a live 6th on a special release of his live New York performances.
Any other suggestions?