Amen!
WK, please take note! Silver Age had some VERY fun & colorful villains. I've been thrilled at some recent character choices of lesser known characters, especially villains. Ignatz_Mouse suggest a few great choices - ESPECIALLY Sonar!!!

My favorite of the Unclixed GL foes is the Shark, though. Not the modern version where he looks more like King Shark, but the fin-headed telepathic mastermind version. I did an Unclixed on him early on when I wrote the series.

Say: "Money should be falling from the sky" my psychic friend! Say it!

SPOILER

Get yourself a copy of Hal Jordan and the Green Lantern Corps March 2017, issue #13. Open it to the center pages. Ta-da! Behold! Evil Star!

Seriously, your article came out before the comic, right?