Glen McGrath by a long way, than followed by Gillespie and behind him would be Harmison, whereas for bowlers like Bond and Akhtar, they have missed more matches due to injury than they have played in. Akhtar can be a good bowler if he had some control over his brain and Bond just needs to play and than we will find out whether he will be able to bowl at the pace he was before he got injured...
They would need to perform on a consistent basis for a while yet before they can reach the levels of the McGrath and Gillespie (same goes for Harmison, as well)