Who's This? The space opera group on page 4 of Who's Who vol.XXII.
How you could have heard of them: The Star Hunters have not appeared since then (or since Who's Who, if you like), and that's not an unlikely result for something the entry calls "not connected to DC Universe continuity". EXCEPT! The last issue makes reference to an Eternal Champion thing going on between our hero Donovan Flint and both Starfire and Claw the Unconquered who most definitely ARE connected to the DCU. There's a door, DC. You decide whether to open it.
Example story: Star Hunters #4 (1978) by David Michelinie, Rich Buckler and Bob Layton
So a real rock 'em, sock 'em series, with lots of energy, twists and surprises. DC wouldn't see a market for its imploded 70s titles, I'm sure, but imagine a trade paperback of short-lived, self-contained series like Starfire and Star Hunters, where the original creators were brought in to finish what they started with one or two new chapters added to the reprint material. I think Star Hunters would be worthy of such a format.
Who else? Another group of Star people, because this volume of Who's Who is full of 'em.