When classic-era Guns N' Roses members Axl Rose, Slash and Duff McKagan kicked off a massive stadium tour with an explosive L.A. gig last week – their first together in decades – it marked the reunion of some of hard rock's best (and most dangerous) hit makers. Even in the band's earliest days in 1985, they were writing anthemic rockers ("Welcome to the Jungle"), heartfelt ballads ("Don't Cry") and multi-part epics ("Rocket Queen"). They've put out five albums and an EP since first terrifying rock radio and MTV with 1987's vicious Appetite for Destruction hits, but along the way, several would-be great songs have fallen by the wayside, languishing on demo tapes, floating around on concert bootlegs and occupying the grooves of long-forgotten B sides. For every regrettable "One in a Million," "Don't Damn Me" and "My World" that made it onto one of their records, there exists a soaring "Goodnight Tonight," poppy "Just Another Sunday" and ripping "Shadow of Your Love" that could have been a smash. Here, Rolling Stone collects the best of the rest.