I believe that hell is indeed empty today. Those who are destined for it are in Sheol.
"Hell" and "Sheol" are synonyms.
In that respect, it is inane to say it is "empty" as long as people die.
But universal salvation is a legitimate Christian view that has significant ancient pedigree and the support of some of the great church fathers.
Hell and Sheol are not the same thing.
"Hell" is the usual KJV rendering of "sheol" and "hades," so some of the greatest masters of English prose would disagree.
If they were then the prophet Samuel is in hell as is David who spoke of going down to Sheol.
Yep, that's where they and everyone else went until Christ broke them out.
Universal salvation might be a kind of Christian view but it flies in the face of the Lord's words about sheep and goats.
Eternal conscious torment might be a kind of Christian view but it flies in the face of the Lord's clear statements of coming to save all and Paul's teaching that "as one trespass led to condemnation for all men, so one act of righteousness leads to justification and life for all men."
As far as I'm aware the principal Church Father arguing for universal salvation was Origin and that opinion was denounced by the Church as a whole.
Origen was hardly alone. Sts Athanasius, Gregory of Nyssa, Isaac of Syria, and many others agreed that all would ultimately be saved.
Universal salvation was not denounced by the Church as a whole. The closest thing would be Emperor Justinian's "Anathemas against Origen" associated with the Fifth Ecumenical Council- however, even assuming these anathemas are legitimately part of the council (they're not), they only denounce a very specific kind of universalism associated with a Platonic pre-existence of souls.