@feli okay I'm not a big fan of French music but I have some suggestions I like :)
this one is pretty and talks about polyamory but there's not much lyrics x)
also I like Stupeflip, a hip hop band which makes pretty good stuff, but I guess the lyrics are difficult to get for a non native speaker
and I like Keny Arkana also, she's a quite angry rapper, she talks about street and nature, I don't listen to her often but I like her universe and her energy.