Louis IX, of St. Louis, Missouri fame, whose feast we celebrated on the 25th springs immediately to mind. Monarchists get all misty eyed about Charles I of Austria as a "modern" example. Actually there's quite a herd of "good" Catholic monarchs pre-reformation but since then certainly they're rather a rare breed.
To me Catholic monarchists are a bit like Star Trek fans... or Civil War reenactors... or sports nuts. As long as they don't show up at the office in uniform they're pretty benign. I'm all in favor of the occasional harmless eccentricity.
USUALLY that’s fine with me, too.
LOL - that's the spirit!