Dante put the Violent into the seventh circle of Hell: serious, but not the worst.
Murderers (violent against their neighbors) were in the First Round of the Seventh Circle, in the river Phlegethon.
Things Dante considered worst than murder:
7th Circle, 2nd Round: Suicide
7th Circle, 3rd Round: Blasphemy, Sodomy, and Usury
The Eighth Circle of Hell, Malebolgia, was for sins of Fraud and Malice.
8th Circle, 1st Bolgia: Panderers and Seducers
8th Circle, 2nd Bolgia: Flatterers
8th Circle, 3rd Bolgia: Simoniacs (those who sell ecclesiastical favors and offices)
8th Circle, 4th Bolgia: Fortune Tellers and Diviners
8th Circle, 5th Bolgia: Grafters
8th Circle, 6th Bolgia: Hypocrites
8th Circle, 7th Bolgia: Thieves
8th Circle, 8th Bolgia: Evil Councelors
8th Circle, 9th Bolgia: Sowers of Discord (religious)
8th Circle, 9th Bolgia: Sowers of Discord (political)
8th Circle, 10th Bolgia: Falsifiers (Alchemists, Evil Impersonator,s, Counterfeiters, and False Witnesses)
The Ninth Circle of Hell, Cocytus was for the worst of sins, Treachery.
9th Circle, 1st Round: treacherous to their kin
9th Circle, 2nd Round: treacherous to their country
9th Circle, 3rd Round: treacherous to guests and hosts
9th Circle, 4th Round: treacherous to their masters
The three worst sinners in Hell were traitors who betrayed their masters: Cassius and Brutus, who betrayed Julius Caesar; and Judas Iscariot, who betrayed Jesus Christ.