Debuting in the pages of Mystery Comics #4 (1944), we have a particularly well-dressed villain:

Wow.

The thigh-high green boots over the way-too-short shorts...the tunic...the groovy flower...And perhaps most of all, that helmet!

Rest assured, The Immortal Emperor is not a robot...

He is an alien, working for Lilith, queen of the "planet that orbits the moon."

As near as I can find, we never see the guy with his helmet off...but more research is required.

Perhaps he deliberately looks so goofy...so Wonderman and others won't take him seriously!

I mean...just look at the guy!

Someone needs to revive this guy--stat!!

SPOILER ALERT: he doesn't die.

The is one iron-clad, never-wrong, absolutely unbreakable rule in comic books:

If your name is Wonder Man (or Wonderman)...

You ALWAYS have the worst damned costume in the universe!

Still, that cover, with Nazis in dyed-green KKK outfits and flamethrowers, was pretty cool. Too bad nothing like that appeared inside the comic...

From Mystery Comics #2 (1944)