Basaveshwara
Wear Shiva on your body (the ishta-linga), worship Him without intermediary, work as worship, and treat every devotee as equal regardless of caste or gender.
Direct, personal, casteless devotion to Shiva. The ishta-linga (a small linga worn on a thread around the neck) makes the deity portable and the worship private. Kayaka (work) is itself worship; dasoha (sharing) is its expression. Basavanna led a 12th-century social-religious revolution that included women (Akka Mahadevi) and lower-caste poets (Allama Prabhu, Madivala Machideva) as equal sharanas.
The Lingayat community of Karnataka, North Karnataka, and parts of Maharashtra/Telangana continues today. The Basava Samiti and many Veerashaiva mathas (Suttur, Murugharajendra, Siddhaganga) are active.