The “great omniscient” Lonchen Rabjam (1308-1364) gathered the lineages and instructions of Mahasandi. He left a vast written legacy with many extensive commentaries and teachings, all of which are preserved within the Tibetan Nyingma tradition. Also pictured are from the upper left: Shri Simha, Garab Dorje and Vimalamitra. On the upper right Jnanasutra, slightly below Manjusrimitra and Guru Rinpoche. Below Longchenpa, Jigme Lingpa, Vajrasattva and Jamyang Khyentse Wangpo.
More information about Longchenpa at Rigpa Wiki.