Nero has been pretty much redeemed in modern scholarship. The majority of the stories about him stems from slander written by avowed enemies of the Julio-Claudians (Tacitus and Suetonius in particular), later amplified by Christian writers who carried a special grudge against him. The archaeological evidence suggests he was a capable ruler, who carried out lots of large scale projects that were pretty beneficial overall, and he certainly didn’t set Rome on fire and fiddled while he watched it burn.