Seems that Harmonix is collecting suggestions for tracks to include in their upcoming Rock Band. The (4 track) submission page didn’t work for me, but for what it’s worth here’s what I suggested, which consisted of tracks picked rapidly from my iTunes collection that I thought would work well:
The first three would be great fun with a guitar but the last one is a great song that’s mostly piano-led which would be a great option for Rock Band.
Edit: and I just realised all my picks were British bands. Not deliberate, but yay. 😉
Edit2: Bonus Track: Solomon Bites the Worm (Bluetones) - that would be fun.