Yes. He was clearly shown to be on par with their heavyweights. Battlecat even handled himself well with Martian Manhunter.
the new 52 version could well be considered a peer to Wonder Woman. Yes, he seemingly killed Superman at one point, and its feasible.
But then, I think a borderline class 100, or class 90 character can hurt Superman, and if they have a magic sword, can certainly impale him.
I think Mongul is in the same ballpark, though probably around Abomination (exactly at 100, the true border to class 100).