Sergei Korolev
Sergei Korolev initially promoted the Soyuz A-B-V circumlunar complex ("7K-9K-11K") concept (also known as L1) in which a two-man craft Soyuz 7K would rendezvous with other components (9K and 11K) in Earth orbit to assemble a lunar excursion vehicle, the components being delivered by the proven R-7 rocket.