The earlier Georges Leygues class ships (e.g. Georges Leygues herself) would be easier, but two kits would be nicer: two different bridges, different Exocet launchers, different masts (plus some other details, e.g. satellite antenna and Simbad launchers?). The hull and some parts could be used to produce also a kit of the Cassard class.
I know the early fit of the class only from books (e.g. Les frégates ASW). Primauguet and La Motte-Picquet I have seen each twice in the 2010s (see the links below the photo gallery).