Drat, I knew I shouldn’t try to post royal geneology so early in the morning!
Akatsukami is correct - it was Owen Tudor who married the Dowager Queen Katherine Valois, and the Seymour who married the Dowager Queen Katherine Parr was not an Earl.
With regard to why there is the fuss about “King Consorts”, I agree with Diceman - sexism is the root of it. At that time, the wife came under the legal control of the husband, so when a queen regnant married, there was always the concern that her husband would become the king regnant. Since royalty tended to marry other royalty or high members of the local nobility, this would cause a problem: either the country would come under the control of a foreign monarch (as was the concern about Philip of Spain), or under the control of a domestic noble, elevated above his peers (Lord Darnley’s elevation was a case in point). Either way, a recipe for trouble.
This morning, I’m a bit more wide awake, and I checked the point about George of Denmark that you raised, Akatusukami. He was still alive in 1702 when Anne became Queen; died in 1708. I’ve never seen him referred to as anything but “Prince George of Denmark.” I think he was made a Knight of the Garter, but I don’t know if he ever got any other titles.
With respect to Matt’s follow-up question, my understanding is that in the feudal period, a distinction was made between possessions that a noble inherited from Dad, and those he just went out and conquered. The inherited possessions went to his first-born son, while the conquered possesions went to his second-born son.
For example, William the Conqueror inherited the Duchy of Normandy from his father, and conquered England. When he died, his eldest son Robert of Curthose became Duke of Normandy, and his second son, William Rufus, became William II of England.
One other example, along the lines Mike mentions, was Bonnie Prince Charlie’s invasion of Scotland in 1745. Charlie’s father, the Old Pretender, was still alive. When Charlie unfurled the standard at Glenfinnan in August, 1745 (see my post in MPSIMS of August 18), he stated he was taking possesion as Regent for his father, whom he proclaimed as James VIII (III of England).