The two are such iconic figures.
As much as I like He-Man he is rather bland. There has been so many barbaric bare chested loincloth wearing heroes similar to he-man.
Skeletor had some unique features. He has a skull for a head. blue & purple color scheme that just pops not to mention the leather look.
the two are very iconic in the way that both have very one sided values & powers. He-Man a strong moral compus for good & strong willed with great physical strength. Skeletor evil cunning as a strength, ruthless determination & manipulative calculation & great magical powers.