I can't recall a sack of Rome by Odoacer, nor can I find after a quick search, but my memory may be lasping here. FWIW, Odoacer did escape to Ravenna to escape

I can't recall a sack of Rome by Odoacer, nor can I find after a quick search, but my memory may be lasping here. FWIW, Odoacer did escape to Ravenna to escape Theoderic and the siege lasted circa 3 years, so it did prove to be a reasonable location from that point of view.