Eagles singer and guitarist Glenn Frey once noted that people “did things” along to his pioneering SoCal country-rock band's songs—fell in love, broke up, you name it. With an album that rubs shoulders with Thriller in the top ranks of all-time bestsellers, the band were avatars of the free-and-easy ’70s; laidback anthems like “Peaceful Easy Feeling” proved it. But they also busted out rockers like “Life in the Fast Lane” and spun spooky tales like “Hotel California,” laced with epic twin-guitar leads. Even long after their heyday, comebacks like shimmering ballad “Love Will Keep Us Alive” held their legend aloft.