Calm_profit
State Vice-Captain
If that's the metric, I believe Chandrasekhar is the most important player for India because he also won matches outside Asia when India was not fully developed cricket nation.The bolded is untrue. There isn't a single bowler from Sachin's time who averages sub 25 vs all teams or sub 30 in all countries. Therefore, it is just as difficult for bowlers to be consistent across teams and countries. It takes one mistake to get a batsman out but if the majority of a teams batsmen are adept at playing a particular type of bowling those mistakes a moot: see Warne vs India.
Also, rules have been created to lessen the advantage the ball used to have over bats: flat wicket, over rates, bouncer restrictions, more protection ,smaller boundaries, better bats etc.
I'll say this and I'll probably get crucified for it but IMO, the most important player that India has acquired in the last 50 years or so is not Sunil, Dev, or even Sachin. It's Jasprit Bumrah. He has single-handedly made the Indian attack potent outside Asia and the team much more capable of winning anywhere than previous Indian teams.