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]
Gupta Empire Following Skandagupta's death, the empire was clearly in decline.[44] He was followed by Purugupta (467–473), Kumaragupta II (473–476), Budhagupta (476–495), Narasimhagupta (495—?), Kumaragupta III (530—540), Vishnugupta(540—550), two lesser known kings namely, Vainyagupta and Bhanugupta.