When Eagles first got together, Glenn Frey was always the real spirit of the band. Sure, Don Henley had the golden voice that sounded immaculate over every single one of their songs, but Frey had the cocksure attitude that they were one of the greatest bands in the world before they had even played a note of music. They were bound to become one of the biggest bands in the world, and it all started by having the right songs for them to sing acro…