| Butler, Oliver | Oliver Butler | Director | 2016 - 2020 | 2 | |
| Bristow, Eugene, K. | Eugene K. Bristow | Director | 1963 | 1 | |
| Bernhardt, Melvin | Melvin Bernhardt | Director | 1962 | 1 | |
| Bigseth, Thor | Thor Bigseth | Director | 1962 | 1 | |
| Bosher, Shane | Shane Bosher | Director | 2011 | 1 | |
| Blondel, Jean-Christophe | Jean-Christophe Blondel | Director | 2012 - 2013 | 13 | |
| Brinkmann, Joachim | Joachim Brinkmann | Director | 1960 | 1 | |
| Bassuk, David | David Bassuk | Director | 2011 - 2013 | 2 | |
| Blyth, Benjamin | Benjamin Blyth | Director | 2013 | 1 | |
| Beilharz, Manfred | Manfred Beilharz | Director | 2013 - 2014 | 1 | |
| Bumbeşti, Victor | Victor Bumbeşti | Director | 1926 - 1929 | 4 | |
| Bán, Ernest | Ernest Bán | Director | 1974 | 1 | |
| Budavári, Réka | Réka Budavári | Director | 2016 - 2019 | 2 | |
| Binder, Raimund | Raimund Binder | Director | 1974 | 1 | |
| Belgrader, Andrei | Andrei Belgrader | Director | 2013 | 1 | |
| Biltz, Karl-Peter | Karl-Peter Biltz | Director | 1959 | 1 | |
| Beard, Peter | Peter Beard | Director | 2013 | 1 | |
| Bartle, Barry | Barry Bartle | Director | 1957 | 1 | |
| Blattner, Lee | Lee Blattner | Director | 1956 | 1 | |
| Brunken, Walter | Walter Brunken | Director | 1956 | 1 | |
| Bürgin, Kurt | Kurt Bürgin | Director | 1956 | 1 | |
| Baas, Cas | Cas Baas | Director | 1956 | 1 | |
| Brooks, Hal | Hal Brooks | Director | 2016 | 1 | |
| Balogh, Valentina | Valentina Balogh | Director | 1983 | 1 | |
| Buzoianu, Traian | Traian Buzoianu | Director | 1970 | 1 | |
| Breneiser, David | David Breneiser | Director | 1955 | 1 | |
| Brenta, Juan, José | Juan José Brenta | Director | 1954 | 1 | |
| Beakel, Walter | Walter Beakel | Director | 1954 | 1 | |
| Bouchehri, Davud | Davud Bouchehri | Director | 1998 | 1 | |
| Burke, Alan | Alan Burke | Director | 1953 | 1 | |
| Bullen, Patrick | Patrick Bullen | Director | 1952 | 1 | |
| Benninghoff, Ludwig | Ludwig Benninghoff | Director | 1951 - 1952 | 5 | |
| Bajramkulov, Achmat | Achmat Bajramkulov | Director | 1999 | 1 | |
| Bugge, Stein | Stein Bugge | Director | 1935 | 3 | |
| Bihr, Jeffrey | Jeffrey Bihr | Director | 1999 | 1 | |
| Bunge, Wolf | Wolf Bunge | Director | 1999 - 2001 | 2 | |
| Bockelmann, Thomas | Thomas Bockelmann | Director | 2000 - 2001 | 1 | |
| Bell, Gary F. | Gary F. Bell | Director | 2017 - 2018 | 2 | |
| Badea, Gelu | Gelu Badea | Director | 2016 | 3 | |
| Barclay-Nitter, Johan | Johan Barclay-Nitter | Director | 1943 | 2 | |
| Bastias, Kostis | Kostis Bastias | Director | 1943 | 1 | |
| Brook, Peter | Peter Brook | Director | 1945 | 1 | |
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