Bhagavan Sri Ramana Maharshi

http://www.arunachala-ramana.org/

Sri Vasishta Ganpathi Muni

http://kavyakantha.arunachala.org/

Sri Anandamayi

Please check :

http://www.anandamayi.org for more details

Swami Vishuddhanandaji Maharaj

Swami Vishuddhanandaji (d. 1937)(sometimes spelled: Vishuddhananda, Vishudhanandaaka; aka: Gandha Baba, Perfume Saint), well-known for his supernatural powers and said to be an adept associated with the mysterious Gyanganj (Jnanaganj) hermitage somewhere in Tibet -- a secret place of great masters -- demonstrated this practice in Varanasi and proved that it is not a myth.More details at:
http://www.geocities.ws/amvaranasi/vswami.html

Sri Soorakaya Swami

Sri Soorakaya Swamiji (1700-1902) holding a staff in one hand, and two dogs like Dattatreya on the other hand roamed the surroundings of Narayana Vanam, which is 35Km from Tirupathi and close to Sri Kalahasthi. More details at:

http://www.srisorakayaswami.org/

http://en.wikipedia.org/wiki/Sorakaya_Swami

Ramalinga Siddha(Vallalar)

Lahari Mahasaya