I didn't mean to imply that any of them were on par with G&L, but I also wouldn't consider G&L to be an "it" brand. They were too cult classic to be; not enough big players in any one genre or time period playing them. Really, none of them were ever "it" brands aside from maybe Hamer, and that was ages ago.
However, Washburn, like G&L, did have a few shorter term high profile endorsers. G&L had Tom Hamilton for a little while, plus Dee Murray and a few others endorsed them in their early years. Washburn had Rudy Sarzo and Pat Badger briefly, and I know during the unplugged craze, they had Darryl Jones, Michael Rhodes and several others endorsing their AEBGs.