The third Prime Minister of India, Indira Gandhi served as PM from 1966 till 1977 and then again from 1980 till her assassination in October 1984. She is considered one of India’s strongest PM and is hailed for leading India to victory over Pakistan in 1971, which resulted in the creation of Bangladesh. However, she is also categorised as authoritarian and is criticised for imposing Emergency in 1975.
Atal Bihari Vajpayee served as the 10th Prime Minister of India and was the first prime minister who did not belong to the Indian National Congress. The BJP politician had been a journalist and an RSS member. He was a noted poet, too. During his tenure as prime minister, he carried out Pokhran II nuclear tests in 1998 and declared India as a country with nuclear weapons capability.
The 14th PM of India, Narendra Modi, created history when he became the first prime minister outside of the Congress party to win two consecutive terms with a full majority; he achieved this feat in 2019. From Bharatiya Janata Party worker to India’s PM, Modi’s journey is remarkable. However, he’s been plagued by controversies too, including the handling of 2002 Gujarat riots.
The 13th Prime Minister of India, Manmohan Singh became the first Sikh in office when he took office in 2004. A prominent economist and academic, he held several key posts in the Government of India in the 1970s and 1980s. Known for his humility, he has been described by the media as "one of the world's most revered leaders."
The second prime minister of India, Lal Bahadur Shastri, was known for his environmental campaigns and his support for the White Revolution. His slogan "Jai Jawan, Jai Kisan,” during the 1965 Indo-Pakistan War, became immensely popular. He ended the war by signing the Tashkent Agreement, but died a day later.
Rajiv Gandhi was the sixth and the youngest Prime Minister of India. He played a major role in suhering the computer era in India. During the initial phase of his term, he was very popular but later on his regime was marred by corruption scandals and he lost the next election. He was assassinated by Tamil militants, while he was the leader of the opposition.
The ninth Prime Minister of India, P. V. Narasimha Rao, is often called the Father of Indian Economic Reforms due to a major economic transformation in India during his prime ministership. He dismantled the Licence Raj and his economic policies rescued India from an impending economic collapse.

Former prime minister of India, H. D. Deve Gowda is currently a Rajya Sabha MP from Karnataka. Born to a backward-class family in Hassan, Deve Gowda had initially studied civil engineering. He had previously been an INC member but later quit the party to become a Janata Dal leader.

Charan Singh was an Indian politician who served as the prime minister of India for a short period of 24 weeks between July 1979 and January 1980. Referred to as the champion of India's peasants, Charan Singh is best remembered for working towards the welfare of farmers. Lucknow's international airport, which was earlier named The Amausi Airport, is now named after him.
Gulzarilal Nanda was the acting prime minister of India after the deaths of sitting prime ministers Jawaharlal Nehru in 1964 and Lal Bahadur Shastri in 1966. The Bharat Ratna winner had previously been jailed twice for his participation in Mahatma Gandhi’s Non-Cooperation Movement. He had also been an economics professor.
V. P. Singh served as the Indian prime minister briefly between 1989 and 1990. The Raja Bahadur of Manda, he was the only Indian prime minister who was also a former king. Initially a Congress member, he later established the Janata Dal. He was married to the Raja of Deogarh’s daughter.

Apart from heading several ministries, Congress leader Yashwantrao Balwantrao Chavan had also served as the chief minister of Bombay State and the chief minister of Maharashtra. He was an active participant in the Quit India movement and had even been jailed. He was a patron of education and culture.
I. K. Gujral had served as the prime minister of India for less than a year in the late 1990s but has been widely discussed for his Gujral doctrine, which focused on maintaining peace with the neighboring countries. A lover of Urdu poetry, he was married to poet Sheila Gujral.

Malik Ambar was a Siddi military leader who served as the prime minister of the Ahmadnagar Sultanate, later serving as its de facto ruler. Brought into India as a slave, Ambar created a mercenary force and pioneered guerrilla warfare. He then went on to found the city of Khirki, which was later renamed as Aurangabad.