Oh, I love this thread! Great idea, Karl!
You got the ball rolling, let's see if I can let it continue to roll...
Vaughan Williams - Thomson, Boult (Decca and EMI), Handley, Haitink, A. Davis, Daniel/Bakels, Previn, Slatkin
Shostakovich - Haitink, Kitajenko, Barshai, M. Shostakovich, Jansons, Rostropovich, Ashkenazy, Caetani, Kondrashin
Sibelius - all of C. Davis (Philips, RCA, LSO Live), Oramo, Blomstedt, Bernstein, both Maazel, Segerstam (Ondine), Vanska, Jarvi (DG), Inkinen, Barbirolli, Ashkenazy, Rattle, Berglund (middle EMI cycle), Sanderling, Sakari
Nielsen - Blomstedt (Decca), Schonwandt, Jarvi (DG), Kuchar, Rozhdestvensky, Salonen
Prokofiev - Jarvi, Kitajenko, Gergiev, Ozawa, Rostropovich
Bruckner - Chailly, Wand, Barenboim (Teldec), Inbal, Jochum (DG & EMI), Karajan, Maazel, Skrowaczewski, Solti, Haitink, Masur
Tchaikovsky - Abbado, Bernstein, Karajan, Jansons, Rostropovich, Muti, Mehta, Temirkanov, Svetlanov
Blue = favorite cycle
To be continued....