Aspect ratio is overrated.
What counts is span loading, i.e. the weight which needs to be supported per unit of span. For more, please read this answer.
Generally, more important than the aspect ratio is the induced drag of a wing which carries a given mass at its center. Now the mass of the wing itself also needs to become small, counterintuitively leading ...
MY INTERPRETATION OF THE QUESTION [NEW]
Here is an image from GlobalSecurity.org which I have modified to illustrate my interpretation of the question. The angle of attack of the wing is exaggerated in the original image.
My interpretation is that the question involves only vertical movement of the wing - e.g. along the vertical red ...