I welcome your untiring search of existence knowledge of Ramayana in Tamil culture. since sangam period. In fact Thieu Viapurippillai an eminent Tamil scholar has quoted Mr.Chadwick writing in !920, that Ramayana Katha has been prevalent all over India, from Kashmir to Kanyakomari.
Tholkappiyam, says V.Pillai, refers to Rama katha in his chapter Thinai- Marabu( Ref. Thamizar Panpadu ) He maintaine that Sanskrit and Tamil have independent origin, but have interacted from ancient Times and in a healthy confluence. THEI WERE HOST OF SCHOLARS LIKE R.P.SETHUPPILLAI, MA.PO.SI, U.VE.SA PARITHIMAL KALAIGNAR AND ALSO KANNATHASAN WER OF THIS VIEW..
Taking the stance of few Tamil scholars who thrust a puritansm of Tamil is erroneous. At the same time to dengrate Tamil cuulture, to deny its identity, and call it paisasa basha is atrocious. Brahmins in their ordinary lif had not fully identified with Tamil culture and . In fact even the Tamil Saivism has ignore ThirukkuraL, suspecting it as Jain writing. Saivites also ignored entire Sangam and Pathnen Kixkanakku Nul and Aimerum kaappiyangaL.
Aryan Dravidian has been politicised. But it is real. hoever the mutuual acculturisation has taken place over three millennium and is inseperable.
Finally for a non- conformist like me it is only of Historical interest.