I'm sorry, I know when someone passes, it's popular to say how great they were, and what a great person they were, and how they changed the landscape, and yadda yadda yadda (even when it is revisionist history).
Sorry, but I was never a huge Eagles fan, and that which I like was usually centered around Joe Walsh (a guitar monster, if you ask me) or, to a lesser degree, Don Henley (don't like him, but love his voice). I thought Glenn Frey was a d***, and most of his tunes (though, to be fair, I'm referring to his solo stuff) is horrible. For all the stick that Phil Collins took for being a sellout from the proggier Genesis, I thought Frey was a far worse offender. "Smuggler's Blues" is easily on my top ten least favorite songs from the 80's lists.
Having said that, as contentious as the Eagles were, I think to a man they all point at Glenn Frey as the man that got that band where they wanted to go. He was a driven man.