Tripple Threat: sami ullah khan
Comparing them on what they have currently done is obviously going to lead to Johnson.
Potential wise its interesting, Aamer at 17 and already hitting 140km/h and picking up wickets can definitely start to increase his speed and fine tune his technique. Parnell is slightly more into his career but also has time to fine tune his things.
Johnson if he figures out how he bowled in SA could still top this list if it was asked again in 5 years time. That spell was one of the best I've seen from an Aussie quick.
At this point I'd go with Aamer...I think he's in his prime right now but I'm hoping he proves me wrong and follow on the footsteps of Wasim and plays for decades.
The thing is, Mitch in full swing is the greatest sight I've seen, he is just the most lethal bowler in the world. When he gets up to the level, no batsman is good enough to play him. Pace, bounce, swing, accuracy, and that awkward left arm slingy style angle. It's incredible. I don't think Aamer or Parnell will ever achieve that.
I really hope he's not in his prime now -__-
I`m yet to see something like that, if it ever existed. Johnson`s best was arguably the series against SA (both home and away) but even then it was nothing like what you suggested. SA would`nt have chased down 413, nor would Dale Steyn have thwarted them for such a long time as he did at the MCG had Johnson`s best been so lethal.
He could be awkward at times. He had a great start to his career but nothing close to what you said about his best.