Tsongkhapa is the founder of the Gelukpa School and is the central figure in their Refuge Tree. He is dressed as a monk and wears the yellow pandita hat this lineage has become associated with.
Guru Marpa was the founder of Kagyudpa tradition of Tibetan Buddhism. He was born in 1012 A.D. in the region of Lobrak Tibet, right above the border of Bhutan.