One of my favorites

Zep is an underrated Metal band? How can the biggest and best HM band of all time be underrated?

That Wayne's World thing was for real, I grew up with it. They were so vaulted and played out by fans that I got so sick of it I couldn't even listen to them for decades.
I do like them now again.

Well if Zep is not underrated then I pick Jimi Hendrix

I wouldn't say Hendrix isn't underrated either, although seems he's not being recognized as Metal by many nowadays, so in that regard he is.

Alright

How the hell is led zeppelin and Jimi hendrix metal?

Same gnib, same

Nice music tastes, but how the hell is led zep an ''underrated'' band?

It is rarely played and not many people like it

with the exception of stairway, of course