Although not wars of the roses, it might be worth seeing if Kingmaker (being sold by 1st corps) go with FR? I'm sure they'd be great for 100 years war, or at least early/mid ish.
That said with the Kingmaker stuff i don't understand why its listed as 15th century. Surely the majority of that century was dominated by the War of the Roses-esque style, save for the first few decades. Sorry to divert it slightly but it confuses me muchly.