Philistin me semble bien, pour suivre Laure.

Sinon, on peut penser à Monsieur Prudhomme chez Henri Monnier, ou Monsieur Homais chez Flaubert. C’est un peu l’archétype du bourgeois, en somme.

Here are two suggestions in the form of song titles taken from my favorite poet/songwriter/singer:

1- “Les moutons” by Jacques Brel

2- “Les Bourgeois” (also by the “Grand Jacques”)

And for a song/song title that confirms my agreement with the accepted answer:

“Les Philistins” by Georges Brassens