There was this lot:
...who pale in hirsuteness in comparison with these boys:
...who are almost a latter-day...
No, you're right. ZZ Top didn't actually show up at Glastonbury although they're still very much a going concern and if you're interested--and are prepared to go to all that trouble--you can catch them on a mammoth US tour round about now. (You'll remember of course that Frank Beard is the comparatively clean-shaven one.)
It's Fleet Foxes though who are pretty much the pick of the beardy bunch for me at the moment. I've been giving their recent Helplessness Blues album a good few spins and it seems to me every bit as good as their 2008 debut. Here's a track from their Glasto set:
Spotter's badge if you identified Elbow and Eels hiding behind the hair at the top of the page.