Is Sehwag the most CONSISTENTLY destructive player to have played international cricket?

I think YES. Note the use of the word consistently. Sehwag's career strike rate in ODI cricket is 100.92. The people with career SR greater than him all have a much lower average i.e. they are not as consistently destructive. In terms of Test cricket, the only person with a better SR than him is Gilchrist. But still Sehwag is more consistently destructive in Test cricket. Consider the fact that he is an opener (i.e. bats in tougher conditions) and he is the only person to have made a triple century in less than 300 . Moreover he has made two triple centuries (only the Don and Lara have achieved this, and neither clobbered as much as Sehwag does). Overall he is one of the few players that all bowlers dread bowling to in today's game.