I think "looking ridiculous" is possible for a man (or woman) of any height. Similarly, it's perfectly possible to look aesthetically pleasing at nearly any height. Most of it has to do with structure, not height. Arms that aren't too short or long. Same with legs. Small waist and even development. There are several guys in my gym that are around 6' that look ludicrous. Some have terrible posture, slouching forward. Undeveloped delts. No legs is extremely common for tall guys.
There are some ridiculous looking short guys, too. Usually it's the stumpy limbs that do them in. I'm lucky that although I'm short, I'm proportionate in the limbs and torso to legs.
Then there's the idiots who just plain can't figure out what to wear, how to cut their hair, or how to speak to others. There's a million ways to look bad.