My vote for 80s/90s villain: The X-Men’s Mr. Sinister.
He’s got that
wierd “Killer Klowns from Outer Space” look. He’s got those goofy
things popping up out of his shoulders. And his name has an 80’s hair
band ring to it.
In other words he’s all about “appearance” with
nothing interesting to back him up as a character, just
like the majority of the 1980s-90s.