Great suggestions so far everyone. I would add:
1. A Jester - I never got the Special version, so it could be cool to have another.
2. A Knight - without crazy colours or overzealous printing.
And not that I like the figures that are based on other franchises or real people, but if they are going to continue this trend - and it looks like they are - I think these could come with some useful parts or be used in other ways:
1. Flynn Rider / Eugene Fitzherbert - The hair on the recent Rapunzel wasn't all that great, but if they released a character in clothing similar to Eugene's, at least we'd have another non-warrior Medieval figure. Tangled wasn't really fully Medieval though, of course...
2. Elsa - She is a character in the new Disney film Frozen. They seem to like characters from Disney films for their princesses in the Fi?ures line, and she is one of a Norwegian sort of ancestry. I think this would be a cool figure.