What about the duc de Montpensier? His sister, AFAIK, was offered for mad James Hamilton of Arran. His other sister was married to Willem I of Orange.
The Montpensier were catholics, the old Duke (Louis III 1513-1582) was one of the most violent leader of the Catholic party beginning in 1560. His wife, Jacqueline de Longwy, was seen as crypto-protestant and two of their daughters married prominent protestant leaders, but they did it with great scandal and without the support of their father. The young Prince-Dauphin (François 1542-1592) was a more moderate kind of catholic, but still a political adversary of the Huguenots. On another side, the Montpensier might be lacking a little in he rank department, being the juniormost princes of the entire french royalty.