Just 5? I'd have trouble limiting myself to 50!
Just 5 off the top of my head?
We're Only In It For The Money - Frank Zappa and the Mother of Invention
Hand Jive - John Scofield
Shack Man - MM&W
Where Have I known You Before - Return To Forever
(ok, top 6)
Black Sabbath - Black Sabbath 
Just to comment on a few of already posted choices;
Stooges-Raw Power, great album but I don't know if I could include it without the first two, can you live without I Wanna Be Your Dog and TV Eye?
Beach Boys-Pet Sounds WHAT AN ALBUM! I'm not a huge Brian Wilson fan but this album is SHEER genius!
(Also Smile)
LedZepplin: #3 and #4 Hard to do without 1 and Physical Graffiti...and all the others too, they're all REALLY great albums, top stuff!
Metallica, hmmmm...I really liked the first album when it was released but they got more commercial and over produced and my tastes had changed by the time of Master Of Puppets that I had developed a strong dislike for them. The original Garage Days was pretty good, a little more real and not too much gloss varnish on the production.
Shakira (who doesn't?) I do like
looking at her
Serval, I've lost touch I guess, out of your choices I've only heard of Queensryche
FUN TOPIC!
