Full confidence Gladiator isn't even on Supergirl's level imo
Gotta ask yourself, "Does Glads have the same juice as Sentry to give it all he's got and depower WBH back to human Banner?" Personally, I don't think he does...
WBH >= Sentry > Gladiator
you're mistaken. Sentry fought World War Hulk which is largely weaker than WBH