Mere average (31), strike rate (43), and economy rate (4.3) do not do sufficient justice to Anil Kumble's ODI numbers. You need more sophisticated numbers.
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For example, you need to check his numbers when he came on first-change in the first ten overs. There used to be a time when Jayasuriya, Afridi, and their ilk used to hit the Indian new-ball bowlers out of the attack.
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Around the fifth or or sixth or seventh or eighth over, then, the captain (Azhar or Tendulkar) used to look around the ground, find Kumble, and make the bowling change.
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Sometimes Kumble failed, but more often than not he succeeded on flat wickets against some of the most brutal batsmen of all time, that too with fielders inside the circle.
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If someone can excavate data to that extent, I think they will find Kumble was one of the finest ODI bowlers of all time.
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Remember, he was a leg-spinner, and an unconventional one at that, and often bowled with limited support at the other end. But he did well, came back in the middle overs, then at the death, basically he used to be everywhere.