I am not sure I agree with your characterization of Indira Gandhi.
> brought Sikkim into democratic fold removing the monarchy
She also de-democratized India through the emergency and became a near-monarch in her time in power.
> spiralling economic decline
Indira Gandhi was the leader during majority of India's biggest decline during the 1980s. It led to India going entirely bankrupt, begging the IMF for money and being coerced into liberalization.
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Indira Gandhi was an IronLady with accomplishments that deserve respect, but her failings with regards to sectarian violence, economy and soft authoritarianism are quite well known and well accepted.
edit: changed phrasing to less inflammatory