ever tried TOOL?
good drop d stuff. white stripes are okay, elephant was a winner. but i have to lol @ them being better than say, Pearl Jam. whom you should really like if you are a classic rock fan. best concerts ever. with the possible exception of the Black Crowes, another group you should like if you're into classic rock. also, you should try a semi-known band out of new orleans called Galactic. they are VERY good musicians.
yes i was in the same boat, listening to CR my whole life. i still do quite a bit, but i try to sample more modern artists as well. worked out well for me.
try the four i listed above, you will like one or two of them if not all.