Only 5 Indian players have scored more than 500 runs in the T20 world cup and 4 of them played in the inaugral T20 world cup. Virat Kohli is the only player to score more than 500 runs in the T20 world cup who didn't play in the 2007 World Cup. The other 4 players are- Rohit Sharma, Gautam Gambhir, Yuvraj Singh and MS Dhoni.
Harbhajan Singh has one of the worst bowling records in a T20 world cup. In the 2010 T20 world cup he played 5 matches and took a total of 0 wickets even after bowling 4 overs in each of the match.
Also interestingly, Yuvraj Singh has taken more wickets than Harbhajan Singh in the T20s. Harbhajan took 25 wickets in 28 innings, Yuvraj Singh took 28 wickets in 58 innings.
It has been around 17–18 years since Anil Kumble retired from ODI and test cricket and still he is the highest wicket taker from India in One Day and Test Cricket. Even in the World cricket Muralidharan remains the highest wicket taker even after one and a half decade and currently no player is even close to their record.
Dinesh Karthik has a pathetic record in the T20 worldcup. He has played in 3 T20 worlcups playing 8 matches and yet he has
Less than 100 runs (71 to be precise)
Average less than 10 (8.875)
Strike rate less than 100 (97.26)
0 sixes and not even one score of 20