Thanks for the scans (love the artwork in that first one).
Okay.
All these fights do not appear to show any superspeed involved. So the question of how BB would handle an opponent moving at superspeed remains open.*
Superman has also handled Darkseid's Omega Beams, which now begs the question: Is BB's scream more powerful than Ds' Omega Beams? Because if not, than BB's scream will have limited effect on Supes.
Also, just because Gladiator is a clone of Superman doesn't mean he is Superman's equal. For example...
Thor > Gladiator
Superman > Thor (and I understand, that JLAvsAvngrs crossover Is canon); therefore...
Superman > Gladiator
Black Bolt has certainly proven himself formidable. But I still can't see myself giving him the majority...not unless people are ready to admit that BB is the MU Top Dog, meaning he can also defeat Thor and Surfer.
* some scans are not coming through, though "relatively fast" is not Superman fast.