the hairloss sucks, yes, but if they look uglier, it's also because of their poise/attitudes/posture/facial expressions.
novoselic: first picture, cocky smirk with others in background, thin. second picture: alone, goofy-*** uncomfortable expression, fat. he looks like a G**d*** fat cat executive.
graeme: first picture: smiling, sunglasses, inviting expression. second picture: looks sad, defeated, arms held in awkward, defensive position, refusal to meet camera's eye.
slater: these two pictures are the most similar, and so there's the least discrepancy in attractiveness. he doesn't look terrible bald.
gabriel: the guy is 60 now, what do you want?