For me, it would be: 1. Nagarjuna. 2. Chandrakirti. 3. Padmashambava. 4. Milarepa. 5. Bodhidharma. 6. Shantideva.
Sorry, I have more than 5
I am not here nor there. I am not right nor wrong. I do not exist neither non-exist. I am not I nor non-I. I am not in samsara nor nirvana. To All Buddhas, I bow down for the teaching of emptiness. Thank You!