Here's a band that, surprisingly, not that many people have heard of. This was one of Sammy Hagar's (Van Halen) first bands, and they have some great songs. Not many videos on youtube, but there self-titled debut album is worth picking up and if you get the chance, some good listens are:
Rock The Nation
Make It Last
Bad Motor Scooter
Black Train
Here's a live video of them back in 1974
http://youtube.com/watch?v=tk52nGxF-jc
Enjoy!