Who among the following individuals was NOT a protagonist or core supporter of the extremist/radical faction within the Indian National Congress?

Madan Mohan Malviya was aligned with the Moderate faction and subsequent constructive constitutional paths within the Congress framework, unlike aggressive radical-extremist ideologues such as Aurobindo Ghosh and Brahma Bandhav Upadhyay. Mahatma Jyotiba Phule was a social reformer outside the core organizational structure of the political factions of the Congress party. Among political participants of the INC leadership, Malviya represented a non-extremist, balanced constitutional approach.