who is considered as the greatest of all the vijayanagar rulers
Vijayanagara Empire With the Vijayanagara Kingdom now imperial in stature, Harihara II, the second son of Bukka Raya I, further consolidated the kingdom beyond the Krishna River and brought the whole of South India under the Vijayanagara umbrella.[29] The next ruler, Deva Raya I, emerged successful against the Gajapatis of Odisha and undertook important works of fortification and irrigation.[30] Italian traveler Niccolo de Conti wrote of him as the most powerful ruler of India.[31] Deva Raya II (called Gajabetekara)[32] succeeded to the throne in 1424 and was possibly the most capable of the Sangama dynasty rulers.[33] He quelled rebelling feudal lords as well as the Zamorin of Calicut and Quilon in the south. He invaded the island of Sri Lanka and became overlord of the kings of Burma at Pegu and Tanasserim.[34][35][36]
Satavahana dynasty The Satavahana power was revived by Gautamiputra Satakarni, who is considered the greatest of the Satavahana rulers.[34] Charles Higham dates his reign c. 103 – c. 127 CE.[34] S. Nagaraju dates it 106–130 CE.[42] The king defeated by him appears to have been the Western Kshatrapa ruler Nahapana, as suggested by Nahapana's coins overstuck with names and titles of Gautamiputra.[41] The Nashik prashasti inscription of Gautamiputra's mother Gautami Balashri, dated to the 20th year after his death, records his achievements. The most liberal interpretation of the inscription suggests that his kingdom extended from the present-day Rajasthan in the north to Krishna river in the south, and from Saurashtra in the west to Kalinga in the east. He assumed the titles Raja-Raja (King of Kings) and Maharaja (Great King), and was described as the Lord of Vindhya.[9]