Понятное дело, что львиную долю так

Понятное дело, что львиную долю такого успеха выполняет издатель, продвигая доверенные ему релизы всеми доступными способами, но и также сама банда, которая сочиняет и исполняет достойный материал, тем самым играя важнейшую роль в деле промоции.

Результаты (английский) 1:

It is clear that the lion's share of this success by promoting Trusted Publisher performs it releases all available methods, but also gang itself, which composes and performs worthy material, thereby playing a critical role in the promotion.

Результаты (английский) 2:

It is clear that the lion's share of this success carries publisher, promoting releases trusted him with all means available, but also the very band that composes and performs worthy material, thus playing an important role in the promotion.

Результаты (английский) 3:

obviously, the lion"s share of that success is the publisher, as trusted him releases all available means, but also by a gang who writes and performs a material, thus playing a crucial role in its.