Who's This? Look no further than page 7 of Who's Who vol. XIV. She's the hot redhead charging a horse at your heart.
How you could have heard of her: When Alec Holland went traveling through time, he did meet Madame .44 and Johnny Thunder (Swamp Thing #85). Her last hurrah was a cameo in Infinite Crisis.
Example story: All-Star Western #118 (1961) by Gardner Fox, Gil Kane and Joe Giella
Who else? Maaldor the Darklord could have made it, but his whole story's pretty much told on his Who's Who page. Fantasy strip supporting players don't usually make the cut, so that's Machiste. No, next up is someone who associated with all the right people to become a star, yet didn't.