Big Name Fan: David Letterman. Zevon was often guest bandleader and has performed on Letterman's show more than any other artist. Letterman is a great fan of Zevon's and provided backing vocals on "Hit Somebody! (The Hockey Song)"
If you also include people who've worked with him numerous times or have covered his work, you can add: Bob Dylan, Adam Sandler, Steve Earle, Linda Ronstadt, Wallflowers, Pete Yorn, Ry Cooder, The Pixies, Jill Sobule, REM, Jennifer Warnes, Tom Petty, Neil Young, Dwight Yoakam, Jim Keltner, Jeff Pocaro, Waddy Wachtel... Let's just say that he's incredibly popular within the business.