In no particular order...

The Clash - s/t (very first one that popped in my head, anyway)
REM - Murmur (although I consider the EP Chronic Town to be their real debut)
The Jimi Hendrix Experience - Are You Experienced (a true game-changer)
The Doors - s/t (ditto)
The Pretenders - s/t (still one of my top 10 discs)
U2 - Boy (no, really)
Arcade Fire - Funeral (looking forward to seeing them in a couple weeks)
Elvis Costello - My Aim is True (I used to be disgusted...)
The Police - Outlandos d'Amour (easy to forget how fresh this sounded back then)
Led Zeppelin - s/t (not really original, but hard to ignore)