Who's This? Charlton's answer to Spider-Man.
How you could have heard of him: His death didn't stick, and he returned in various stories in the 2000s and 2010s (Booster Gold, Justice League 3000) and is finally back for good post-Rebirth, even if another Blue Beetle made a splash (and is even headed for the big screen) while he was dead. Two famous characters are really Ted Kord, but someone told a creative team they couldn't use him. One is the Atom in Arrow/Legends of Tomorrow, and the other is Nite Owl in Watchmen.
Example story: Blue Beetle (vol.5) #1 (June 1967) "Blue Beetle Bugs the Squids" by Steve Ditko and D.C. Glanzman
Our story begins in Hub City, on the waterfront, as these sticky criminals climb up to a building's penthouse and are almost immediately jumped by the Blue Beetle. It's basically the splash, and having a guy act as a back brace is something he considers an assist. He's got them on the run, and following them out the window requires he call the Bug. Quite the utility vehicle!
I remain a big fan of Blue Beetle's short Charlton era, and while the DC series had its charms (under Paris Cullins's pencil, certainly) and even re-imagined some of the same stories (Pago Island, the Madmen), I wish it had FELT more like this, i.e. more solid action and fewer ongoing subplots. It may or may not have helped, I don't know.
Who's Next? A weirdness magnet