viggop: Some additions to your list:
ANNaamalai reddiyaar
DaNdapaNi desikar
Kambar ( kamba raamaayaNam has been set to music by some musicians. One of my Tamil professors used to sing kambaraamaayaNam verses in the class room. He also sang silappadhikaaram verses.)
Ilango adigaL (silappadhikaaram)