Fleetwood Mac

Before the girls and the pop hits came along,Fleetwood Mac was a great blues band founded by Peter Green.From 1967 to 1969 they were the top blues band in England.

Absolutely right.

They actually have two albums that are titled only "Fleetwood Mac" - one from 1968 and one from 1975. They bear virtually no resemblance to each other. The first is great blues stuff in the vein of John Mayall's Bluesbreakers and the other much more pop oriented.

You'll miss some good stuff if you ignore the earlier period.

I've always thought "Mirage" was underrated...and a pretty nice recording, too. It's not up to par with the eponymous album, much less "Rumors," but I like it at least as much as "Tusk." YMMV....

you can't go wrong with any of their records up through rumours, but understand they are all different...once the band found commercial success, 'the formula' set in....you gotta get a stevie nicks 'package'....my favorites are 'then play on' 'kiln house' 'future games' and 'bare trees'....honorable mention to 'heroes are hard to find'.....not the best band ever, but the output is an incredible feat for a band that always had one foot in the grave and the other on a banana peel.

I've always been partial to "Pious Bird of Good Omen" alhough quite different from the titles mentioned in the OP.