Rong-zom-pa (RZ2: 38) seems to recognize the following typology of buddha:
(a) ontological buddha (sc. dharmatā = buddha)
(b) gnoseological buddha (sc. advayajñāna = buddha)
(c) physiological buddha (sc. rūpakāya = buddha)
He maintains that this concept is found in Sūtric scriptures. Note that, as pointed out in Almogi 2009: 224, n. 121, for Rong-zom-pa, one of the arguments for positing that all phenomena are already/primordially/inherently/immanently awakened is that all dharmas can impossibly be not buddha if dharmatā is buddha. And for him, dharmas and dharmatā are essentially connected.