Well actually, my all time favorite band is The Jesus And Mary Chain.
I also like many of the bands already mentioned by everyone so far.
But here are a few of my most cherished. In no particular order:
The Velvet Underground.
The Sex Pistols
The Ramones.
Beastie Boys.
Blondie.
The Associates / Billy McKenzie.
Led Zeppelin.
Motorhead.
AC/DC.
Leonard Cohen.
Janes Addiction.
Adam And The Ants.
There are just so many. But those are a few anyway. I have to say I would have always expected Sonic Youth fans to also like many other good bands but I have been truly impressed with most of the choices many of you have made in this thread. Some of those bands mentioned in this whole thread are very much under-appreciated by the masses as a whole.
But people of taste are always going to be in the minority. Simply because Sonic Youth fans are unlikely to be sheeple.