Guitar Hero was a major party game franchise back in its heyday and is still a big favorite to this day even if all the old peripherals are no longer officially sold and all that's left is the new Guitar Hero Live.
I think the problem the original Guitar Hero games had was that they released too many games too fast and ran out of big-name songs to use, but that's only looking at the music industry. If the eligible songs expanded to games, there's an entire medium they could use, full of challenging, catchy guitar jamming up there with the best of them. Entire franchises are built on rocking tunes. Look at how puny all the sections on this TVtropes page are compared to the Video Game one.
It's not like music needs lyrics. Cliffs of Dover in Guitar Hero 3 and Frankenstein in the original game are both classics.
It's sad that the only thing qualifying for game music in a Guitar Hero game is recreations with the music creator and the Halo theme.
That's why to demonstrate the musical strength of games and just for fun, I'm making this list of 10 game/game franchise soundtracks that should be in a Guitar Hero game. To show how impactful and challenging they are, for each I will pick out what I think would be the most difficult song to play and the most iconic song that every fan should know (usually opening or credits music). There's only so much you can say about music in words, so this won't be especially text-heavy.