I'd advise the 3940 (US 3286) as "frigate" or "corvette" for your island's French army. It even has the right colours: red deck with blue stickers (French ships often were applied with red paints)
If the colours turn out like they appear on the images, and if the fake guns below deck are exchangable, I'd advise the new 5135 (to be released in August in Germany & Benelux) as an English naval vessel (with the skull-sail exchanged for a normal one).
The 3740 white schooner is well suited too, but much smaller.