Not really. I'd use a valor bard to replace the cleric as armored front line support. The valor bard doesn't have the fighter weapon masteries, armor training, and fighting styles; and we're already into the subclass before looking at fighter subclasses.cant the fighter be replaced with valor bard?
But @Lanefan was going by the quote from the PHB that states a bard can be a substitute for a cleric, rogue, or wizard. I think that would be a valor bard, dance bard, and glamour or lore bard respectively.