He clearly isn't. He is widely accepted as being one of the players who never achieved what they could have done. You can't polish over his average of 15. Nor is bringing two test series in a conversation about one day cricket a worthy arguement.
I really fail to see your point. They had the same average but Colly has managed to score centuries, bowl decently and outfield Thorpe and you reason Thorpe being equal because if he had of managed to score some centuries his average would be better? The point is he couldn't.
Recall again. Only Flintoff, White and Threscothick were capable of hitting sixes regularly. While at least 9 in the current team are capable of doing that today.