Who is known as the 'father of orchestration'?

Giovanni Gabrielli

https://en.wikipedia.org/wiki/Giovanni_Gabrieli

There were quite a few gems here, many of them too rarely performed. The music of Giovanni Gabrieli, sometimes called "the father of orchestration," proved a special treat, with its lightning quick trade-offs of musical impulses between choirs and instruments, no transitions allowed, the music jumping across space. In the "Sonata pian' e forte," for brass, he added explicit loud and soft dynamics (one of the first pieces to do so), creating distant echoes and explosive responses.

https://www.ocregister.com/2007/11/04/pacific-chorale-basks-in-the-glory-of-venice/

Amembal Dinkarrao or D'Amel is rightfully called as the Father of Orchestration of Hindustani classical music.

http://www.kamat.com/database/biographies/amembal.htm


K.V.S. Vinay is a violinist and known as the father of orchestration of Carnatic music.

Hector Berlioz, France, 19th Century, Father of orchestration

https://www.britannica.com/biography/Hector-Berlioz