No Superstar has ever achieved this..
Amitabh name was taken for a namesake because he was leading in most number of circuits for longer time but Dharampaji was bigger than him North and that means proper North
Haryana even Delhi was a close call
Amitabh was leading in all the states below that
Even Amitabh's big hits were used to fall below Dharmendra movies in that region and Dharampaji movies were widely overperformed there, he used fetch more price for Punjab than amitji and this is at a time when no one was close to Amitabh in any other circuit.
Right now it's Megastar Salman Khan leading in most of the circuits
From Punjab, Haryana, Delhi to UP, MP, Bihar, Odisha and All the Western part Maharashtra, Gujarat, Rajasthan, Goa
But still it's not well enough because SRK is still numero uno in West Bengal and Aamir in Karnataka , Tamilnadu and Kerala.
Nizam or Hyderabad is a close call between Salman and Srk. .
Hrithik is still very much popular down South and Odisha but needs a comeback.
So your answer is no one ever was biggest in all circuits of India even boi had said this once.
Bottom line:- Only Prabhas has chances to become India's first and Only Pan Indian Superstar no one else was or is a Pan Indian superstar. Period