BR Ambedkar was greater than Nehru .Apart from drafting the constitution Ambedkar worked for gender equality in Hinduism . Hindu Code Bill ( no polygamy for Hindus ) and equal property rights for Hindu women were the greatest achievements of BR Ambedkar.
Nehru made a mess of many things for which India is still paying the price. Mainly taking Kashmir to UNO , capitulation of Indian Interests in Tibet , Non use of Air Force in Indo Chinese War -1962 , Surrender of Coco Islands in strategic Bay of Bengal to Burma ( Burma later gave them to the Chinese ) Nehru rejected a proposal from Nepal for Nepal joining India etc etc.
Sardar Patel was the Greatest Indian after Gandhi . Sardar brought peaceful union of Princely states to India. Sardar had warned Nehru regarding Kashmir and Tibet .
A little known inside in to Sardar`s greatness . While India and Pakistan were fighting over Kashmir and demarcation of other Muslim majority areas there was one strategic area which was totally Muslim. Lakshdweep Islands Sardar quietly sent a naval ship.which hoisted the Indian Flag there few days later a Pakistani ship came but had to return. . The greatness of Sardar lies in the fact that Sardar never let Lakshdweep Islands become an issue .