He is great but there were better.
Bradman can't be compared to Sachin because Bradman was playing in the era of uncovered pitches.
Even in similar era Lara was better in test matches, Sachin can be called the greatest in One day history though he never won the One day world cup but you can't fault him for not stepping up. He was on fire in '96 and 2003 but was let down by that shocker of a pitch and other batsmen in '96 semis and the bowlers in 2003 finals.

In test matches Lara was a class apart, pity he never had support.