Best band never to release a truly great album?


Yeah, I know, another poll, but these are kind of fun and this one may be a little different. Let's limit it to no earlier than the late 60's (when the album began to be more important than the single). What musician/band do you really like, but has never quite put it all together to make that brilliant album you know is in them.

I'll start by nominating Jethro Tull. Lot's of great songs, but I cannot think of a single Tull record I would call an unqualified success.
curbach
Zaikesman-
I guess I misunderstood this thread to mean what great groups never produced a commercially great album. The English Beat (and General Public) were one of my favorite bands and I own all their excellent albums. Blind Faith had two incredible songs on their album: Had To Cry Today, and I Can't Find My Way Home. Presence of the Lord was good and the rest was mediocre. Considering the talent of each member (Clapton, Winwood, Baker, and Grech) of Blind Faith, I was expecting one of the best albums ever. I saw Beck, Bogert and Appice and was "blown-away," but their album never got the play it deserved. Rockpile just never took off in the US and they should have.
This thread provides solid proof that there's no accounting for taste. That said, I'd nominate the Yardbirds. And I'm surpised nobody's mentioned the Dead, who are always described by the committed as "much better in concert."

As for quibbles with the preceding, anybody who thinks the Velvets' White Light (or even Nico) doesn't consitute a great album is setting a very high standard. I'd agree on Bloomfield's solo work (though I think Super Session is overrated, but then I'm not a Kooper fan), but I credit him for much of what shines on the first two Butterfield albums.
After reviewing the responses, I'm somewhat confused. I think we need some definitions. What defines a "truly great album"? Commerical success; i.e., a gold or platinum album? Artistic success, rather reconized by the "critics" or not? For example, Jethro Tull, Little Feat, Lynyrd Skynyrd and Moby Grape were all listed as "best band never to release a truly great album" I don't know -- in my book "Aqualung", "Dixie Chicken", "Street Survivors" and "Moby Grape" (first album) were all great albums within their musical categories; i.e., Tull's melding of riff-rock, folk, and progressive style, Little Feat's groove-pop and rock stew, Skynyrd's southern rock and Moby Grape's melding of pyschedelia, rock,county-funk and folk. Having said all the above, my nomination (based on the criteria of artistic achievement, reconized or not) is David Lindley's "El Rayo X".
if single artists are included, dave mason never received his solo statis acclaim. ditto on earlier mentioned little feat. kurt
Well, to clarify, I definitely meant great on a subjective artistic level. Everyone knows sales figures don't mean jack, general critical opinion only marginally more than jack. So we're really just talking personal opinions here. . .