Hmm. My old favourite which never went anywhere was actually a team: Infinity Inc.
I was an avid reader of All Star Squadron from about the time I was 15 or 16 and loved the appearance of a mysterious group from the future - the 1980s - in WW2.
I was a big fan of Brainwave Junior ( stupid name but an innovative idea for 1984 - the son of the JSA's biggest foe joins their children's group), Obsidian and Jade, Silver Scarab, and the girl Wildcat, Yolanda Montez. I regretted Roy Thomas' decision not to include a child of the Silver Age Flash and the Silver Age Superman and Lois Lane in the group. Northwind and Nuklon didn't do much for me: both seemed half-baked concepts.
Too many of the characters suffered at the hands of Geoff Johns in JSA, the Crisis in 1987, the writers of that big Eclipso event years ago, and even by Neil Gaiman - his use of Fury (daughter of the Silver Age Wonder Woman) in The Sandman was a very major plot line but left the emotionally scarred and fragile character almost beyond reasonable use going forward.
The newer versions of Infinity Inc have almost no resemblance to the original version.
