If you're okay with songs in foreign languages, READY STEADY GO by L'arc~en~Ciel (who are Japanese despite the name) might work for Courfeyrac. Lyrics here with English translation, and video here. It was also used in an abbreviated form as the second opening theme for the first Fullmetal Alchemist anime, if you've seen that.
I also feel like "Bright College Days" by Tom Lehrer has potential as a complete snarkfest about higher education.
ETA: For doomed barricade times, "A Secret He Will Take to His Grave" by Murray Gold is a good instrumental, as is "A Special Sort of Bus" by the same composer for a more militant feel (shhh, yes, I know they're from Doctor Who soundtracks. They're good music).
"Outlands" from the TRON: Legacy soundtrack by Daft Punk might work for barricades or intense!Enjolras.
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I also feel like "Bright College Days" by Tom Lehrer has potential as a complete snarkfest about higher education.
ETA: For doomed barricade times, "A Secret He Will Take to His Grave" by Murray Gold is a good instrumental, as is "A Special Sort of Bus" by the same composer for a more militant feel (shhh, yes, I know they're from Doctor Who soundtracks. They're good music).
"Outlands" from the TRON: Legacy soundtrack by Daft Punk might work for barricades or intense!Enjolras.
And "Nagai Nagai Yume no Naka no Utagai" is a jazzy instrumental from the Baccano! soundtrack that might work for Courfeyrac.
Also, "I Want to Hold Your Hand" by the Beatles for Grantaire and Enjolras.^_^