Nayanars

63 Shiva mystics from Tamil Nadu. Their works are found in the Tirumurai and sung at 276 Padal Petra Sthalam.

Life stories of the Nayanars in prose
https://shaivam.org/devotees/63-nayanmarkal
https://www.dlshq.org/download/nayanar.htm

Complete Periya Purana – life stories in poetry
https://shaivam.org/devotees/periyapuranam-of-sekkizhar-english-translation

The counterpart of Vishnu tradition are the 12 Alwars.