Yes, big frames can look awkward. I ride 61-65, and sometimes have a hard time taking good looking pics of my bikes.
But there's details that can make these huge contraptions easier on the eye:
Definitely 700 wheels. None of my 650b conversions scored any aesthetic points!
Fenders. Makes the wheel diameter appear larger.
For photos jam the stem down the steerer racing style. Easy to do.
Big chainring needs to be truly big (53T+)
Old fashioned race bars, with sweet curves and big drop. Once took a profile shot of my 65cm Trek with tight rando bars. Ugh!