Tamil,an Indian playback singer in Hindi, Tamil, Malayalam, Kannada and Telugu movies, an established ghazal singer, and one of the pioneers of Indian fusion music. In 2004, he was awarded the prestigious Padma Shri and Yesudas Award for his outstanding performance in music.

Hariharan is the correct answer. He is Tamil, a multilingual playback singer across Hindi, Tamil, Malayalam, Kannada, and Telugu films, an established ghazal singer, and pioneered Indian fusion music with Colonial Cousins. He received Padma Shri in 2004. Jagjit Singh was primarily a ghazal singer. The Khan options are Pakistani, not Indian fusion pioneers.