2 parts to this thread.
Firstly which of today's pace bowlers has the best bowling action?
James Anderson perhaps? Jerome Taylor maybe? Dale Steyn? Or someone else?
and secondly, which pace bowler in the history of the game has had the best bowling action?
Kapil Dev, Dennis Lillee, Mike Hendrick, Imran Khan (later in his career), Shaun Pollock are just some that spring to mind.