Ok this is what I found:
https://www.viki.com/users/happytohappy - last found active 5 months ago.
https://www.viki.com/users/prasanthjmp_228- active an year ago.
https://www.viki.com/users/sundusparkz_785 - active a month ago.
https://www.viki.com/users/sbv_95 - active 8 months ago.
https://www.viki.com/users/dukedivan - active a month ago.
https://www.viki.com/users/deepa_arul787_231 - active a month ago.
https://www.viki.com/users/shobanakani91_902 - currently active.
https://www.viki.com/users/mehreecreates_234 - active 10 months ago.
https://www.viki.com/users/_park_ji_hae - idk much about this user but this user expressed the desire to be a tamil subber in a post.
https://www.viki.com/users/yazhinibalasundar7_763 - active 2 months ago.
https://www.viki.com/users/sneha_narayanaswamy - active currently.(she does both hindi and tamil but mostly hindi.)
https://www.viki.com/users/uniquesoul_699 - active currently.
https://www.viki.com/users/shreenithi43_697 - active 6 months ago.
https://www.viki.com/users/hermyanee_103 - active 3 months ago.
https://www.viki.com/users/soloblue - active 3 months ago.
https://www.viki.com/users/shanav - active 3 months ago.
https://www.viki.com/users/hameedas031_831 - me
https://www.viki.com/users/_euphoria/overview -active recently.
https://www.viki.com/users/shashira0108_334/overview - not much info found on profile
I will update if I find someone new. Also if you are a tamil subber viewing this post leave your info in the replies.