The one who went with Hal and Ollie was Appa Ali Apsa. When the Guardians went off on a vacation with the Zamorans, Appa stayed behind to keep an eye on things, went mad with power and tried to dismantle the universe before Hal and John and some others stopped him. Kind of went from an example of writers being fair(ish) to the Guardians to the other end of the spectrum there.