Imperial Service College

ISC had itself previously absorbed the United Services College. Military alumni with distinguished careers are very numerous. A random selection of those mentioned elsewhere on the Internet includes:
Col. John L. Collard, MC, Order of the Star of Nepal, Nepalese Burma Medal
Air Vice-Marshal Sir Laurence Sinclair, GC
Group Captain Randolph Stuart Mills DFC
Sir John Gorman, MC
Wing Cdr Clive Beadon, DFC, Burma Star
Sir Richard Williams, DSO, OBE, CBE CB, KBE: the only Australian to command the RAAF Wing in the field in World War I and the first Australian to become Air Marshal

Alumni mainly known for non-military reasons include
Charles Ede: founder of the Folio Society (http://www.bl.uk/whatson/exhibitions/folio)
William Hartnell: actor who played the first Doctor Who
Krishen Khanna (http://www.contemporaryindianart.com/krishen_khanna.htm): Indian artist