As @Valorum pointed out in comments, there are lots of Indian superheroes in Marvel. Here's the list: http://marvel.wikia.com/wiki/Category:Indians
Also, worth pointing out: Indian gods Bramha, Vishnu, Mahesh (Shiva) and Indra have appeared in Marvel comics. Thor even defeated Shiva (which is funny because Shiva's third eye can destroy the universe).
When Thor defeated Shiva in Thor #301:
In another issue:
Note: Depictions of gods would look funny to someone who is familiar with those gods in modern media (TV etc), but Marvel's version can't be wrong as they include all the signature features provided by religious texts viz. 4 heads of Bramha, 3 eyes of Shiva.