The best CG in the Marvel Cinematic Universe is hard to pin down, as there's just much of it at such a high quality. When it comes to sheer quantity of visual effects shots one could argue that Marvel Studios has created an offshoot industry as thousands of shots have been created by an army of visual effects studios that span the globe, and literally works 24/7 when factoring in the time zone differences.
In order to manage the demand for digital content several visual effects coordinators are assigned a particular set of visual effects companies to support the production visual effects supervisor and producer. The process is as epic as the end product which are perennial Oscar-nominees for Best Visual Effects. (Get an insight with Ant-Man VFX secrets and Marvel's The Avengers concept art.)
