I think the most imortant aspect of the question is being overlooked.

When you ask "What defines a great bowhunter?", who are you suggestion would be doing the judging?

If you are setting your standards, based on the "collective opinion" of others, are you really getting the most enjoyment out of your hunting?

When you apply your standards to judge someone else, you may decide YOUR opinon of that person based on those standards, but you cannot change their standards, or make them any better or worse of a hunter unless they agree to your standards and adopt them for their own.

I decide what the criteria is for making a good hunt for me.I decide if I want to shoot a doe, or an inmature buck, and only I can decide if is a good thing for me or not.

Your standards of judgement may or may not include such things as "Maturity of the animal harvested", "Effort level required to complete the hunt", Time spent hunting", "Time spent preparing for the hunt", "Accuracy of the shot", "Making good decisions, to ensure clean shots and quickkills"or many other things.

For me, (and this is my personal standards), the greatest bowhunters are the ones that know what they want to hunt, spend the time to undertand their prey so they can effectively hunt that prey in the environment whereit lives, and don't get overly concerned about what others might think.